[God] delights, it seems, in using trees, flowers, rivers, automobiles, friends, enemies, church buildings, paintings in order to announce his presence or to work out his purposes. . . . There is something crude in the depiction of God intervening directly in the play . . . interrupting the speeches of the other actors and upsetting the stage. How much more tantalizing the God who hints and lurks and cajoles hiddenly through and around the actors, even unbeknowst to them. It is the humble God who chooses so to act.
–Robert E. Barron
God maintains a delicate balance between keeping his existence sufficiently evident so people will know he’s there and yet hiding his presence enough so that people who want to choose to ignore him can do it. This way, their choice of destiny is really free.
–J. P. Moreland