Book IV: Chapter 2 The Three-Personal God Summary and Analysis

The three-personal God is in a different dimension than our three-dimensional universe, where a single personality can be made up of three others, and so Christians have the Trinity: the Father, the Son and the Holy Ghost. Lewis begins this argument by dismissing all other forms of God conceptualization as invented by humankind, and the evidence he puts forward is the simplicity of the human inventions. God cannot be simple. God must be of a higher dimension, one where more than one being exists as a single whole.

The idea of reaching enlightenment and becoming one with God is not right, according to Lewis. He imagines this as losing the sense of self, and in the Christian conceptualization of God, the sense of self is maintained. When Christians go to Heaven...