In theology, the doctrine of divine simplicity says that God is without parts.

The importance of the concept is that God as a simple being is not divisible, and thus, he is present in his entirety everywhere that he is present, if he is present anywhere. In light of this idea, Thomas Aquinas wrote that, because God is infinitely simple, he can only appear to the finite mind as though he were infinitely complex. This doctrine also helps keep trinitarianism from drifting or morphing into polytheism, belief in multiple distinct Gods.

See also

Trinity