[HumanaeVitae]

Is God willing to prevent evil, but not able? Then he is not omnipotent. Is he able, but not willing? Then he is malevolent. Is he both able and willing? Then whence cometh evil? Is he neither able nor willing? Then why call him God? --Epicurus

This is the question that the branch of theology called theodicy deals with. Human free will is the only defense against this challenge.

[demosthenes the elder]

not really.
perspective is another defense, and in my opinion a better one.