"IT was Huxley and Herbert Spencer and Bradlaugh who brought me back to orthodox theology. They sowed in my mind my first wild doubts of doubt. Our grandmothers were quite right when they said that Tom Paine and the Freethinkers unsettled the mind. They do. They unsettled mine horribly. The rationalists made me question whether reason was of any use whatever; and when I had finished Herbert Spencer I had got as far as doubting (for the first time) whether evolution had occurred at all. As I laid down the last of Colonel Ingersoll's atheistic lectures, the dreadful thought broke into my mind, 'Almost thou persuadest me to be a Christian.' I was in a desperate way."
~G.K. Chesterton: Orthodoxy.