The nobility of a human being is strictly independent of that of his convictions.
It is sometimes important for science to know how to forget the things she is surest of.
Truth is always served by great minds, even if they fight it.
The books one has written in the past have two surprises in store: one couldn't write them again, and wouldn't want to.
In our ideals we unwittingly reveal our vices.
The least one can say of power is that a vocation for it is suspicious.