Stupidity is sometimes the greatest of historical forces.

The easiest rationalization for the refusal to seek the truth is the denial that truth exists.

Religious tolerance has developed more as a consequence of the impotence of religions to impose their dogmas on each other than as a consequence of spiritual humility in the quest for understanding first and last things.

Nonetheless, it still remains true that as a set of cognitive beliefs, religious doctrines constitute a speculative hypothesis of an extremely low order of probability.

Life has meaning for anyone who takes an interest in it.

Tolerance always has limits - it cannot tolerate what is itself actively intolerant.

Everyone who remembers his own education remembers teachers, not methods and techniques. The teacher is the heart of the educational system.