A friend of mine told me he got this quote from a Voice of the Martyrs newsletter.
Suffering is, directly or indirectly, God's punishment for sin. To deduce from such suffering that there is no God is to deny instrumentality. One might as easily prove that a child has no father by the fact that his father spanked him.Suffering and the problem of evil is one of the leading reasons why people claim they do not believe in God. If these same people would put a little thought behind their emotions, they might be able to reason through to the truth. Suffering and the existence of evil is one of the best evidences FOR the existence of God. Now, if you want to reject God as being mean or uncaring because of the existence of evil and suffering, that is another matter all together. That too is irrational once you learn the facts about God's character, but to deny God's existence due to his instrumentality in dealing with human disobedience and sin is just outright foolish.
Here are 35 proofs of the existence of God so if even if you don't buy into the existence of suffering and evil as solid evidence for God's existence, you'll still need to explain away at least 34 more good reasons to believe. The fool says in his heart, "There is no God." (Psalm 14) Unfortunately, in our post-modern culture people have believed the lie that reason is the opposite of faith. Nothing could be further from the truth. The opposite of reason is irrationality. The opposite of faith is unbelief, and it is unbelief in the face of the evidence that convicts non-believers who persist in the irrational viewpoint that God does not exist.