Since God is perfect, he should never have a reason for changing his mind. However, some biblical passages describe God as modifying his chosen course of action in response to prayer. How could human prayers ever be efficacious if God’s mind is always independently set on doing what is best? This article examines contemporary attempts to answer the question by emphasizing the benefits of prayer for the petitioner. After exposing some difficulties with this solution, the author proposes that one can (...) overcome the problem of petitionary prayer by reflecting on the relationship God wishes to develop with his human creatures. From this vantage point, one can see that God’s willingness to change his mind in response to prayer proceeds from his free decision to accept his human creatures’ input as he partners with them to realize his plan for the world. (shrink)