The Three-Personal God

Big idea

Summary

Building on the previous chapter's begetting-versus-making distinction, Lewis addresses people who say they believe in a God 'beyond personality' but resist calling Him personal. He argues that such people usually end up imagining something less than a person rather than more, and that Christianity is unique in offering any positive content for what a truly super-personal being might be like, rather than simply gesturing at vague absorption into an undifferentiated divine ocean.

To make this concrete, he offers the analogy of geometric dimensions: a single dimension yields only a line, two dimensions combine lines into a flat figure like a square, and three dimensions combine such figures into a solid like a cube. He suggests that on the 'divine level,' personalities combine in a similarly richer way that human experience cannot directly picture, so that God can be three Persons and one Being just as a cube is six squares and one solid.

Lewis then makes the doctrine practical by describing an ordinary Christian's evening prayer: God is the goal being prayed to, God the Spirit is the very impulse prompting the prayer from within, and God the Son stands alongside as the one who makes intercession possible. He roots this understanding in history, tracing it to the disciples' actual experience of a man who claimed to be God, was seen alive again after death, and was later known as an indwelling presence, and insists that this developed picture is 'experimental' theology, not an invented simplification.

The chapter closes with a graded comparison of sciences according to how much 'initiative' their subject matter has—inert rocks, evasive wild animals, a human friend whose trust must be won, and finally God, who alone can choose whether and how fully to be known. Lewis argues that a person's whole moral and spiritual condition functions as the very instrument of this 'science,' and that Christian community, not private cleverness or homemade religion, is the proper setting in which God is most fully perceived.

Key points

• Argues that people who want a God 'beyond personal' usually end up with something less than personal, whereas Christianity alone offers a positive, super-personal alternative.
• Uses the progression from line to square to cube as an analogy for how three divine Persons can combine into one Being beyond ordinary human categories.
• Rejects the 'drop of water absorbed into the sea' picture of union with God, since that model implies the self's dissolution rather than its fulfillment.
• Describes ordinary prayer as an enactment of the Trinity itself: God as the goal, God as the inward prompting, and God the Son as the helping presence alongside.
• Frames theology as 'experimental,' arising from the disciples' historical encounter with a man who claimed to be God and was later known as an indwelling Spirit.
• Argues that knowing God requires increasing 'initiative' on the object's side, so that only a morally receptive person and a united Christian community can perceive Him clearly.

Illustrations & analogies

• Lewis uses the progression from a one-dimensional line to a two-dimensional square to a three-dimensional cube as a picture of how three Persons can remain one Being on the 'divine level.'
• He critiques the popular image of a soul being 'absorbed' into God like a drop of water slipping into the sea, arguing this pictures annihilation rather than the Christian promise of becoming more fully oneself.
• He compares God's uneven self-disclosure to sunlight reflecting more clearly in a clean mirror than a dusty one, to explain why some people seem to perceive God more readily than others.
• He ranks sciences by how much 'initiative' their subjects have—rocks, wild animals, a human friend, and finally God—to show that knowing God depends entirely on God's willingness to be known.

Notable lines

The Christian idea is the only one on the market.

C. S. Lewis Book IV, Ch. 2 — The Three-Personal God

human souls can be taken into the life of God and yet remain themselves

C. S. Lewis Book IV, Ch. 2 — The Three-Personal God

it takes two to make a friendship

C. S. Lewis Book IV, Ch. 2 — The Three-Personal God

For reflection and discussion

1. How does the line-square-cube analogy help you, or fail to help you, imagine a three-in-one God?
2. Lewis says the initiative in knowing God lies entirely on God's side. How might that shape the way you approach prayer or spiritual seeking?
3. Why might Christian community, rather than solitary insight, be the setting in which God is most fully known, according to Lewis?