Recently discussing with a friend who has Wayne Grudem's Systematic Theology book, we were speaking about a claim Wayne Grudem makes in the chapter about prayer. Wayne Grudem states on Pg. 377 that "prayer changes the way God acts". Wouldnt this imply that God has changed His mind? He gives Moses as an example in Exodus 32:9-14. The link is here Systematic theology: an introduction ... - Google Books Is this not just open theism? And lastly, how do we understand phrases like " God repenting"? And the other examples he gives? In advance, thanks.