"To learn how to think"

"FOR this is one of the very queerest of the common delusions about what happens to the convert. In some muddled way people have confused the natural remarks of converts, about having found moral peace, with some idea of their having found mental rest, in the sense of mental inaction.... To become a Catholic is not to leave off thinking, but to learn how to think."

~G.K. Chesterton: The Catholic Church and Conversion.