If what you state is true, how can petitionary prayer have any influence on God? Is this not a new thought:
Genesis 6:6 (KJV) And it repented the LORD that he had made man on the earth, and it grieved him at his heart.
You’re asking two questions, there. Let’s take the second one first:
Is it true that God, having seen what mankind had done, suddenly changed his mind about having created him? I would answer
no. This is merely an anthropomorphism, and it allowed the original audience to relate to God a bit more easily. Otherwise, it makes an ancient people – whose understanding of God, at that point in salvation history, was far less mature than ours is – wonder whether God isn’t simply a monster who creates only to destroy. (In fact, I would assert that the Flood narrative is present in order that
we, not
God, might learn something valuable.
Second question, now – “how can petitionary prayer have any influence on God?” In the Catholic tradition, we might say that petitionary prayer changes
our hearts, not God’s. We would say that God has His will, and what He wills, actually happens. What our prayers do is to bring
our hearts, and our desires, and our wills in line with God’s. He always knows what we’ll ask for, and when we’ll ask for it, and therefore, He’s never unaware of what we ask for. But, perhaps, we’re unaware of what His will is, and therefore,
we’re the ones who need to change.
Another way of looking at it is how we might understand Jesus’ assertions that all we need to do is ask for something and it will be granted. (Atheists
love this quote, by the way, and attempt to twist it into a proof-text that the Bible is untrue!) Tell me – if I were to pray “dear Lord, please strike @KevinK dead with a painful injury”… would Jesus honor that prayer and do what I asked? Of course not! Jesus won’t do
just anything, and especially not things that are not good and virtuous! So… what did Jesus
really mean? He meant that we are supposed to want what’s good – that is, what God wants for us. And therefore, He wants us to ask for the good gifts that God wants to give us.
Those are the petitions that He will grant!