Only the noble of heart are called to difficulty.

It is so hard to believe because it is so hard to obey.

I have attacked no one as not being a Christian, I have condemned no one.

The more people who believe something, the more apt it is to be wrong. The person who's right often has to stand alone.

Out of love for mankind, and out of despair at my embarrassing situation, seeing that I had accomplished nothing and was unable to make anything easier than it had already been made, and moved by a genuine interest in those who make everything easy, I conceived it as my task to create difficulties everywhere.

It is impossible to exist without passion

It is perfectly true, as philosophers say, that life must be understood backwards. But they forget the other proposition, that it must be lived forwards.