To attribute size to God is to make Him subject to degrees, which He can never be, seeing that the very idea of degree relates to created things only. That which is infinite cannot be greater or less, larger or smaller, and God is infinite. God simply is without qualification.1
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Infinitude can belong to but One. There can be no second.2
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Again, to say that God is infinite is to say that He is measureless. Measurement is the way created things have of accounting for themselves. It describes limitations, imperfections, and cannot apply to God. Weight describes the gravitational pull of the earth upon material bodies; distance describes intervals between bodies in space; length means extension in space, and there are other familiar measurements such as those for liquid, energy, sound, light, and numbers for pluralities. We also try to measure abstract qualities, and speak of great or little faith, high or low intelligence, large or meager talents.
Is it not plain that all this does not and cannot apply to God? It is the way we see the works of His hands, but not the way we see Him. He is above all this, outside of it, beyond it.3
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God’s gifts in nature have their limitations. They are finite because they have been created, but the gift of eternal life in Christ Jesus is as limitless as God. The Christian man possesses God’s own life and shares His infinitude with Him.4
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God is self-existent and self-contained and knows what no creature can ever know—Himself, perfectly. “The things of God knoweth no man, but the Spirit of God.” Only the Infinite can know the infinite.5
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… the word infinite describes what is unique, it can have no modifiers. We do not say “more unique” or “very infinite.” Before infinitude we stand silent.6