 Theists have traditionally recognized a number of limits on God’s actions. For instance, it is common to insist that God’s omnipotence does not imply that God can do impossible things, such as create stones that are too heavy for God to lift. It is also common to insist that God cannot do that which is intrinsically evil, because God is morally perfect. (For a discussion of petitionary prayers for bad things, see Smilansky 2012.) Since God is provident, one might also suspect that God would not answer petitionary prayers for things that would interfere with God’s providential plans for the world. Within these limits, one might wonder whether there is enough room among the space of God’s reasons for petitionary prayers to make a difference, and what kinds of reasons such prayers could provide for God.