As Absurd As Blaming the Sun Rays
The following analogy by John Calvin attempts to help us understand the mystery of how God can be perfect in love and perfect in righteousness, and how at the same time God can ordain that evil exists or–even more mysteriously–cause evil to take place:
Whence, I ask you, comes the stench of a corpse, which is both putrified and laid open by the heat of the sun? All human beings see that it is stirred up by the sun’s rays, yet no one for this reason says the rays stink. Thus, since the matter and guilt and evil repose in a wicked man, what reason is there to think that God contracts any defilement if He uses his service (the evil man) for His own purpose?