  So Scriptural considerations suggest a God at least much less changeable than we in some respects. But the roots of the full DDI are also philosophical. In thinking out their views of God's nature, Western philosophers have largely filled out the concept of God by ascribing to him the properties they thought he must have to count as absolutely perfect. God's perfection seems to rule out many sorts of change, as we've just seen. More general arguments from perfection convinced classical theists that God cannot change in any way.