Genesis 9:16

"Whenever the rainbow appears in the clouds, I will see it and remember the everlasting covenant between God and all living creatures of every kind on the earth."  Genesis 9:16

Here he is pointing out that this promise from God is everlasting.  He didn't say "I won't destroy all life by flood for the next 10 years or even for the next millennia," but he promised that he would never again destroy all life by flood.

When God says "I will see it," the Qbible translates this as "I will look at it."  So he's not going to just notice it out of the corner of his eye as an after thought, but he's going to actively look at the rainbow and remember his promise.  God will actively remember and keep his promises.