Most Replayed Moment: The 4 Personalities Living In Your Brain! How To Switch Between Them

Jill Bolte Taylor and Steven Bartlett discuss the distinct personalities embodied by different regions of the brain, offering insight into how these characteristics shape human behavior, identity, and wellbeing.

Character one: Analytical, Goal-Oriented Personality Dominating Professional and Social Roles

Personality Prioritizes Facts, Details, Judgment, and Linear Task Organization

Jill Bolte Taylor names the left thinking system “character one” and gives her own this persona the name Helen—“Helen Wheel, she gets it done.” This personality focuses on delivering facts and details, making distinctions between right and wrong, or good and bad. The left thinking system is all about organizing information, harboring A-type traits, and excelling in work or social structures that require structured, scheduled, and rational decision-making.

Character One Represents the Ego Center For Identity, Language, Math Reasoning, and Motor Control in the Prefrontal Cortex

Taylor explains that character one’s “thinking system” is in the left hemisphere’s prefrontal region, which is the ego center—here, the sense of “I” and individuality begin and end. This region is responsible for language creation, understanding, reading, writing, mathematics, and controls the opposite side of the body’s motor functions. All of these functions reinforce one’s identity and sense of agency. This personality is aimed at fitting the individual into society and utilizes verbal communication as a key tool.

System Excels at Structuring, Scheduling, and Rational Societal Decision-Making

In Taylor’s framework, character one is who “goes to work,” fitting itself into society and navigating roles that demand attention to detail and rational thought.

Character Protects Against Future Hurt Based On Past Pain

The Left Emotional System Tracks Trauma to Shield Against Future Suffering

Taylor describes a second character, rooted in the left hemisphere’s emotional system—character two—whose critical role is to track every traumatic event and store past pain as a protective mechanism. This part of the brain operates linearly across time and is always vigilant for reasons to trigger emotional reactivity as new information becomes associated with old wounds.

Insular Cortex's Role in Addiction Origins and Compulsions

The insular cortex, within the limbic system of the left hemisphere, is the site of craving and integral to the origins of addictive behavior. Character two’s focus on past pain and craving highlights its role in compulsions and addictions.

Character two's Well-Meaning Protection Triggers Emotional Reactivity When New Information Associates With Past Pain

Taylor points out that character two (her own is named Abby) is often unhappy and always runs in the background, protecting the present self from repeating past trauma. While this protection is well-meaning, it results in emotional reactivity, which many people strive to “fix” or diminish, not realizing its core biological function is to shield from future hurt based on historical experience.

Character Three: Embodies Playful, Present-Moment Awareness Without Judgment on Consequences or Social Rules

Personality Focuses On Sensory Experiences Like Temperature, Clothing Sensations, and Environmental Tone

Character three emerges from the right hemisphere’s emotional system. Taylor highlights its focus on immediate, sensory experiences—like the feel of clothing, the temperature of the air, and present environmental tones. This personality embodies pure, experiential awareness.

Youthful, Impulsive Character Three Creates Problems

Taylor describes character three as youthful and impulsive, often leading to reckless or inappropriate behavior without regard for consequences or societal rules—illustrated by ...

The brain’s hemispheres each operate with distinct modes of awareness and processing, shaping our consciousness, time-orientation, and sense of self.

Right Hemisphere: Present-Moment Awareness Without Past, Future, or Identity

Jill Bolte Taylor explains that the right hemisphere is entirely present-focused, describing it as a "right here, right now machine." This hemisphere does not access the past, anticipate the future, or possess a narrative identity. As Taylor states, "Right here, right now, that's all it has. Doesn't have the past, doesn't have the future, doesn't know who you are." In the right hemisphere, there is no conception of self or personal history; experience is unified with the present moment.

The right hemisphere prioritizes relational context and sees things in relation to the broader whole rather than in isolation. It is unconcerned with strict categories or distinctions, focusing instead on the big picture and the individual's relationship to it. The right brain cares about broad perspectives, feeling calm, and present-moment awareness, as described during the exercise with light stimulation, where Bartlett reports feeling more relaxed and “like I'm laying low on a sun lounger.”

Left Hemisphere Constructs Time, Identity, Logic For Planning, Memory, Social Navigation

In contrast, Taylor describes the left hemisphere as the part of the brain that introduces linearity across time. The left emotional system remembers every traumatic or significant past event and uses that information to avoid future harm. This side links past to future via language, categorization, and causal reasoning.

Crucially, the left hemisphere forms the sense of ego and identity. Taylor articulates, "in the left hemisphere, it's all about me," identifying this region as the center of 'I,' 'me,' and the individual's personal boundaries and history. The left system distinguishes where "I begin and I end," and builds an individual narrative.

Additionally, the left hemisphere enables language (spoken, read, and written), mathematics, and linear motor control, supporting complex problem-solving, planning, and analysis. These abilities are essential for complicated social navigation and task-oriented behavior.

Light From Visual Fields Activates Each Hemisphere's Neural Systems, Shifting Conscious Experience

The experience of consciousness in each hemisphere can be influenced by which hemisphere is being stimulated with sensory input, specifically light from visual fields. Taylor explains that the visual system is divided at the retina: light entering from the later ...

Jill Bolte Taylor describes practical approaches to recognizing and balancing different brain states, leading to improved outcomes in various aspects of life.

Recognizing the Active Brain Personality Through Self-Observation

Taylor emphasizes that the first step toward effective self-regulation is self-observation. By paying attention to one’s thoughts, feelings, and bodily sensations, individuals can discern which of their brain’s “characters” is active.

Identifying Character One Through Focus, Impulses, List-Making, and a Desire to Manage People, Places, and Time

Character One emerges when the mind is focused on judgment, productivity, or organization. For example, when listening to a conversation and evaluating its usefulness—thinking, “this makes sense, I want more,” or “this is just crap, I can’t go there”—you are likely inhabiting Character One. Character One is also present during list-making or when trying to manage people, places, or time.

Recognizing Character Two's Activation By Observing Reactivity, Grudge-Holding, Resistance, and Defense Against Threats

Character Two surfaces in moments of reactivity, resistance, or defensiveness. If you find yourself holding grudges, feeling threatened, or putting up emotional defenses, it’s likely that Character Two is in control.

Character Three's Playful, Joyful, Non-judgmental, Sensory Delight

When you are playful, filled with joy, and free of judgment—perhaps laughing, moving, or indulging your senses—you’re experiencing Character Three. Taylor illustrates this with an example from a hospital: she instructed medical professionals to draw a hopscotch outside the ER, which led to doctors and staff briefly connecting to their playful side, restoring their spirit. Character Three brings refreshing joy even during busy or stressful times.

Observing Character Four Via Gratitude, Awe, Interconnection, and Wisdom About Life's Meaning

Character Four is accessed during moments of gratitude, awe, and interconnectedness. When you pause to appreciate the universe, feel thankful for the small things, or contemplate the deeper meaning of existence, you are embodying Character Four. Taylor notes how even a brief sense of gratitude or awe can transform your perspective and make life feel like a celebration.

Sensory Activities Balance Dominant Brain Systems

Taylor recommends using sensory activities and conscious engagement with all four brain personalities to balance dominant patterns and improve well-being.

Playful Breaks Disrupt Productivity Drive

Allowing Character Three to intervene with playful breaks can disrupt the relentless drive of Character One. For instance, taking time to play basketball, even when “too busy,” releases stress and endorphins, leaving you refreshed, creative, and open-minded before returning to tasks.

Sensory Pauses Cultivate Presence and Calm

Pausing for sensory experiences, such as feeling the air, listening to music, or savoring a moment of silence, supports calm and presence. This practice allows you to shift from task-driven focus to a more holistic awareness, balancing the brain’s productivity and the need for relaxation.

Practicing Conscious Engagement With all Four Personalities

Taylor asserts that you can consciously practice identifying and engaging each of your brain’s four personalities. With regular self-reflection and mindfulness, it becomes possible to move fluidly among these states, responding optimally to changing demands.

Techniques Like Lateral-Light-Blocking Glasses Provide Immediate Neurological Feedback on Hemisphere Activation

Taylor highlights a tool developed by psychiatrist Frederick Schiffer, who uses lateral-light-blocking glasses with patients to help reveal and balance their brain’s hemispheric personalities. These glasses can provide immediate neurological feedback, helping individuals directly sense which ...

Societal Dysfunction Arises From Over-Reliance on Left-Brain Over Right-Brain Wisdom and Interconnection

In modern society, the left hemisphere’s dominance traps people in judgment and tribalism, as Jill Bolte Taylor points out. When society focuses excessively on personal gain and “me, me, me” thinking, it loses sight of shared humanity, the fragility of resources, and our collective well-being. This left-brain centric culture cultivates emotional volatility, division, and neglect for the broader “we,” contributing to widespread societal unrest.

Physicians and other high-status professionals are particularly affected. Society expects them to always operate in left-brain professional mode: authoritative, busy, and infallible. They are granted little space for their own mental health, which leads to a sense of isolation and burnout. Taylor emphasizes the alarming rate of suicide among physicians, attributing it to the unrelenting expectation that they remain in this hyper-rational, emotionally restricted state, never allowed time or support to reconnect with joy or peace.

Accessing Right-Brain Systems Provides Neurological Access to Peace, Joy, and Vitality That Transforms Mental Health

Taylor explains that the right hemisphere is neurologically wired for peace, contentment, and vitality, but modern life makes it difficult to access these states. Intentional practices that activate the right-brain are essential for achieving natural mental health and resilience. When medical professionals, for example, have even brief moments of right-brain joy and connection, it can restore their glee and provide vital moments of restoration—enough, at least momentarily, to reduce burnout. These right-brain experiences, whether through connection, play, or awe, renew inner resources and help balance the constant demands of left-brain living.

Recognizing the Miracle of Existence Cultivates Gratitude and Compassion For Others and the Planet

A profound way to achieve inner balance is to recognize the miracle of one's existence. Taylor urges listeners to consider the incredible odds against being alive: the specific egg cell that made each person began forming during their mother’s fifth week of gestation. Out of 400,000 potential egg cells, only a tiny number survive to conception. From conception, for nine months, one’s cellular DNA replicates at a staggering rate of 250,000 cells every second, reaching 50 trillion cells by birth. The unlikelihood of existing at all should inspire deep awe and appreciation for life.

This awareness shifts consciousness toward wonder and reverence. Recognizing the improbability and fragility of life, Taylor suggests, helps override feelings of unworthiness or sel ...