From The Brothers Karamazov :
In my opinion miracles will never confound a naturalist. It is not miracles that bring a naturalist to faith. A true naturalist, if he is not a believer, will always find in himself the strength and ability not to believe in miracles. And if a miracle stands before him as an irrefutable fact, he will sooner doubt his own senses than admit the fact. And even if he does admit it, he will admit it as a fact of nature that was previously unknown to him. In the naturalist, faith is not born from miracles, but miracles from faith. Once the naturalist comes to believe, then precisely because of his naturalism, he must also allow for miracles.
HT: Bob Prokop