If God thinks this state of war in the universe is a price worth paying for free will--that is, for making a live world in which creatures can do real good or harm and something of real importance of real importance can happen, instead of a toy world which only moves when He pulls the strings--then we may take it it is worth paying.
C. S. Lewis (2012). “The Complete C. S. Lewis Signature Classics”, p.53, HarperCollins UK