Faith: not wanting to know what is true.

Mastery.- We have reached mastery when we neither mistake nor hesitate in the achievement.

It is only those who know how to feel that "this is not good" who devise improvements.

Who can attain to anything great if he does not feel in himself the force and will to inflict great pain?

The perfect woman is a higher type of humanity than the perfect man, and also something much rarer. The natural history of animals furnishes grounds in support of this theory.

The most dangerous follower is the one whose defection would destroy the whole party: hence, the best follower.

Belief in truth begins with doubting all that has hitherto been believed to be true.