This is why the medieval scholastic proofs are not addressed to unbelievers, but to those who already share in the life of faith. Similarly, no one has ever lost their faith because of an argument. Many people claimed to lose their faith after reading Darwin, but this can only mean that their faith was an empty shell. Someone falling out of love might offer reasons why the previous object of their affection is no longer lovable, but these reasons are only the barometer of an inexplicable inward change. So it is with faith.
Miracles are one of the chief points of contention between religion and science.
But here again the terms of the debate are often misunderstood. There can never be a scientific proof of the impossibility of miracles, but science proceeds on the assumption that miracles don't happen, that the laws of nature are inviolable. Whenever a scientist is confronted with a strange occurrence, he or she will assume the operation of a hitherto undiscovered natural law rather than supernatural agency. But religious believers disdain this kind of pragmatic justification. And so we reach a deadlock.