The Simplicity of God
The simplicity is of great importance, nevertheless, for our understanding of God. It is not only taught in Scripture (where God is called “light,” “life,” and “love”) but also automatically follows from the idea of God and is necessarily implied in other attributes. Simplicity here is the antonym of “compounded.” If God is composed of parts, like a body, or composed of genus (class) and differentiae (attributes of different species belonging to the same genus), substance and accidents, matter and form, potentiality and actuality, essence and existence, then his perfection, oneness, independence, and immutability cannot be maintained. - Herman Bavinck, Reformed Dogmatics, Volume 2, 176.
“What are you, Lord, what are You; what shall my heart understand You to be? You are, assuredly, life, You are wisdom, You are truth, You are goodness, You are blessedness, You are eternity, and You are every true good. These are many things, and my limited understanding cannot see them all in one single glance so as to delight in all at once. How then, Lord, are You all these things? Are they parts of You, or rather, is each one of these wholly what You are? For whatever is made up of parts is not absolutely one, but in a sense many and other than itself, and it can be broken up either actually or by the mind – all of which things are foreign to You….Therefore there are no parts in You, Lord, neither are You many, but You are so much one and the same with Yourself that in nothing You are dissimilar with Yourself. Indeed You are unity itself not divisible by any mind. Life and wisdom and the other [attributes] then, are not parts of You, but all are one and each one of them is wholly what You are and what all the others are. Since, then, neither You nor Your eternity which You are have parts, no part of You or of Your eternity is anywhere or at any time, but You exist as a whole everywhere and Your eternity exists as a whole always.” Anselm of Canterbury, The Major Works, p. 98.