Interesting, is it not? The rainbow is not just a memory hook for you and me. Surprisingly, we see here that it is a reminder for God! I do not think that we would ever think of Him forgetting, so that is put there for you and me to take assurance in.
These last two scriptures especially, are something that Richard referred to this morning. They are anthropomorphisms. It is a way of perceiving God as if He were a man and needed to be reminded. It is something that we can relate to. It is ascribing human qualities to God.
We know He does not forget at all! That is put there just in case this slips our mind; to know that God is going to be reminded. He is right there and He is going to be working on our behalf, even when we think that He has gone way off somewhere.