De Somniis (lib. i-ii)

You see now the preface of the lover of self who being easily moved, and changeable, and fickle, both in his body and soul, says, "I thought that I was standing," and did not consider that unchangeableness and steadiness belong to God alone, and to him who is dear to God.

And the most evident proof of the unchangeable power which exists in him is this world, which is always in the same place and in the same condition. And if the world is immovable how can the Creator of it be any thing but firm? In the second place the sacred scriptures are likewise most infallible witnesses;