PDF Summary:Interior Castle, by St. Teresa of Avila

The spiritual life can feel abstract and difficult to navigate, but St. Teresa of Avila offers a concrete framework for understanding your journey toward God. In Interior Castle, she uses the metaphor of a castle with seven mansions to describe the stages of spiritual growth, from initial struggles with worldly distractions to the ultimate union with the Divine.

Teresa explains how prayer, humility, and self-denial are necessary to progress through these stages. She describes various spiritual experiences—from recollection prayer to advanced union with God—and emphasizes that true devotion is demonstrated through active love for others. This guide explores Teresa's teachings on the characteristics of spiritual growth, the importance of aligning your will with God's, and how to discern genuine spiritual experiences from false ones.

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The Benefits of Mindfulness

Teresa’s advice to become more self-aware and to disregard the plans that come into your mind while praying is similar to the practice of mindfulness. According to psychologists Kirk Warren Brown and Richard M. Ryan, mindfulness involves an open, receptive attention to present experiences, allowing individuals to notice their thoughts, feelings, intentions, and actions with greater clarity and less defensiveness, rather than operating on automatic pilot. By cultivating this nonjudgmental, moment-to-moment awareness, people become better able to regulate their behavior, act in ways that are congruent with their deeply held values and needs instead of with habitual or socially prescribed patterns, and, as a result, experience enhanced psychological well-being and more satisfying, autonomous, and compassionate relations with others.

Devotional Practices & Experiences

Teresa asserts that devotional experiences can be intense and beyond human understanding. The soul might feel harmed by love, but it cannot explain how or who caused it. It’s aware of God’s presence, yet it cannot enjoy Him, which causes a sweet pain. It’s full of longing but cannot decide what to request. It feels a burning heat, though it doesn't scorch it to the point of consuming it. This experience isn’t permanent, and the spirit yearns to suffer the loving pain again. It's resolute in its intent to endure suffering for God and to withdraw from the pleasures of the world, moved by a longing to enjoy God and to sing His praises.

The Neurological Basis of “Sweet Pain”

In Why God Won’t Go Away, Andrew Newberg, Eugene d’Aquili, and Vince Rause suggest that the “sweet pain” Teresa describes may be a result of the brain’s unique response to deep contemplative practice. They explain that during intense spiritual experiences, the brain’s limbic system (which regulates emotions) and autonomic nervous system (which controls bodily arousal) become highly active. This heightened arousal creates a powerful “charge” in the body, which can feel like a burning heat or intense energy. However, unlike ordinary stress or pain, this arousal is experienced as safe and meaningful because the brain’s orientation association areas (which create our sense of self and body boundaries) become less active. This allows the intense energy to be interpreted as a positive, loving force rather than a threat.

Teresa also notes that a person might experience a deep, spiritual pain that’s both delightful and distressing. This pain indicates that God is drawing the soul to Him. The soul senses God is there but cannot fully enjoy Him, which causes it to yearn for Him even more. This isn't truly pain, and it's not continuous—it comes and goes according to God's will. It isn’t caused by Satan, fantasy, or melancholy, but by God Himself. The devil is unable to unite pain with tranquility and joy in the soul. The pain originates in a region where the devil lacks authority. The pain instills a determination in the soul to suffer for God’s sake and to withdraw from the pleasures of the world.

(Shortform note: If a person were to take this teaching to heart, it could be dangerous. If a person is experiencing pain, they might not seek help because they believe it’s a sign from God. They might also withdraw from the pleasures of the world, which could lead to isolation and loneliness.)

Teresa notes that reflecting on Christ's life remains important even for people who undergo divine contemplation. Some people find they aren't able to meditate on Christ's life as they once did. This is because meditation is intended to find God, and when the soul has achieved that, it no longer wishes to exert itself in intellectual labor. However, Teresa argues that meditating on Jesus' life is still important. She believes that neglecting this meditation can harm one's soul.

(Shortform note: In Teresa of Avila, Rowan Williams argues that Teresa’s insistence on meditating on Christ’s life reflects a broader trend in late-medieval Western mysticism. In this tradition, the imagination is the primary means of accessing God. This tradition emphasizes the importance of meditating on Christ’s life, and it views the more wordless forms of contemplation as a means of deepening one’s understanding of Christ’s life. Williams argues that Teresa’s teachings are a radicalization of this tradition, rather than a departure from it.)

Traveling Through the Dwelling Quarters

Teresa explains that the path through the mansions requires modesty and self-denial. Humility is required to advance. You must believe that you’ve only made slight progress and that others are progressing more quickly. You should also want others to view you as inferior to everyone else. Without humility, you'll remain unchanged for your entire life, suffering many difficulties and hardships.

Without renouncing yourself, the path is difficult and overwhelming. You'll be burdened by your miserable nature, a burden not shared by people who make it to the higher mansions.

(Shortform note: Teresa’s advice to believe you’ve only made slight progress, to want others to view you as inferior to everyone else, and to focus on your “miserable” nature may be dangerous. In The Psychology of Religion and Coping, Kenneth I. Pargament explains that some religious coping strategies can be harmful. For example, if you believe that God is punishing you, you may feel more shame and distress. This can lead to psychological problems and even interfere with your spiritual growth.)

In this section, we'll learn about prayer and joining with God. We’ll also discuss trials, discernment, and the path forward.

States of Prayer and Union

Teresa says that authentic unity with God is achieved by aligning your will with His. This union is the truest and most secure, bringing peace now and in the next life. A soul that has achieved it isn’t afflicted by anything earthly, except the loss or offense of God. The soul recognizes that God understands His actions more thoroughly than the soul comprehends its own desires. The Lord requires just two things of us: loving Him and loving our neighbor. If you achieve these virtues perfectly, you'll fulfill His will and become one with Him.

The Scholastic Background of Teresa’s Understanding of Union

In Teresa of Avila, Rowan Williams explains that Teresa’s understanding of union with God is rooted in the scholastic tradition’s concept of charity as a friendship with God. This tradition holds that charity is a divine gift that draws the person into God’s own act of loving, so that the very center of human choosing is reorganized by this friendship. The agent’s desires and decisions are progressively shaped from within by God’s self-giving love, in a way that the scholastic tradition is able to describe as a genuine communion of willing between God and the soul. This theological background helps explain why Teresa can speak so confidently about the soul’s ability to will what God wills through love of God and neighbor.

Teresa also describes the Recollection Prayer as a state where the soul regains control and external distractions fade. This supernatural state doesn’t require shutting your eyes or any other external action. It’s the first step toward attaining divine consolations. There's no need to give up meditation or using the understanding. The will is focused on the Divine, and the spirit expands to receive all that God gives it.

The Tradition of Recollection

Teresa’s language of “recollection” and her practical teaching about it stand firmly within a well-established late-medieval and early-modern Iberian tradition of recogimiento; she is drawing on, reworking and deepening a style of prayer already articulated in the Franciscan milieu, above all in Francisco de Osuna’s Tercer abecedario espiritual, which she read with great profit. Osuna’s handbook offers a carefully structured account of recogimiento as an interiorising discipline in which the believer is taught to withdraw the scattered powers of the soul, to centre attention within, and to remain in a quiet, loving awareness of God’s indwelling presence; Teresa takes over this basic schema and vocabulary, but presses it in a more radically Christological and ecclesial direction, integrating it into her wider vision of the soul’s journey and the reform of religious life.

In this section, we'll learn about the characteristics of advanced spiritual unity with God.

Characteristics of Advanced Union

Teresa describes advanced union as a profound and inseparable connection between the soul and God, where the soul is in constant communion with the Divine. This union is likened to a spiritual marriage, where the soul and God become one, inseparable. The soul experiences a deep sense of certainty and peace, knowing that God dwells within it and that it resides in God. This certainty isn’t based on physical senses but on a spiritual understanding provided by God.

(Shortform note: Teresa’s use of the “spiritual marriage” metaphor is not unique to her. Bernard McGinn, a scholar of Christian mysticism, notes that Bernard of Clairvaux’s twelfth-century sermons on the Song of Songs were the first to use the bridal metaphor to describe the Christian experience. Bernard’s sermons, which were delivered over 18 years, are considered a significant development in Christian mysticism, as they introduced a new way of understanding the relationship between the soul and God.)

Teresa explains that one's soul is filled with divine vitality and nourishment, and this union produces effects that are felt throughout the soul and body. The soul stays wholly spiritual, united with the Uncreated Spirit in a heavenly bond. This union is a hidden and sublime favor, a delight that cannot be compared to any other experience. God reveals the extent of His love by merging Himself with His creation, creating an inseparable bond.

(Shortform note: In The Three Ages of the Interior Life, Reginald Garrigou-Lagrange explains that in the highest prayer of union, the soul receives a participation in the divine life itself. This means that the soul’s very mode of existing is elevated to a new dependence on God’s own act of being. This is what Teresa means when she says God “merges Himself with His creation.”)

Trials, Discernment, and the Path Forward

Discernment is crucial in understanding where spiritual locutions originate, Teresa says. These can originate from God, evil forces, or the imagination. Locutions originating with the devil cause anxiety and upheaval. Locutions arising from one's imagination are unclear and indistinct. If you receive a locution, you should consult a wise confessor before acting on it.

(Shortform note: One danger of following Teresa’s advice is that you may mistake a mental health condition for a spiritual experience. For example, people with schizophrenia often experience auditory hallucinations, which can be mistaken for locutions. If you treat these hallucinations as spiritual experiences and only discuss them in confession, you may delay getting the medical treatment you need.)