Faith from miracles or miracles from faith

"Miracles are never a stumbling block to the realist. It is not miracles that prompt realists to belief. The genuine realist, if he is an unbeliever, will always find strength and ability to disbelieve in the miraculous, and if he is confronted with a miracle as an irrefutable fact he would rather disbelieve his own senses than admit the fact. Even if he admits it, he admits it as a fact of nature till then unrecognized by him. Faith does not, in the realist, spring from the miracle but the miracle from faith. If the realist once believes, then he is bound by his very realism to admit the miraculous also. The apostle Thomas said that he would not believe till he saw, but when he did see he said, 'My Lord and my God!' Was it the miracle that forced him to believe? Most likely not, but he believed solely because he desired to believe and possibly he fully believed in his secret heart even when he said: 'I do not believe till I see.'"

- Fyodor Dostoyevsky, The Brothers Karamazov