A loving heart is the beginning of all knowledge.

The merit of originality is not novelty; it is sincerity.

Every new opinion, at its starting, is precisely in a minority of one.

Thought once awakened does not again slumber; unfolds itself into a System of Thought; grows, in man after man, generation after generation, - till its full stature is reached, and such System of Thought can grow no farther, but must give place to another.

The Great Man's sincerity is of the kind he cannot speak of, is not conscious of: nay, I suppose, he is conscious rather of insincerity; for what man can walk accurately by the law of truth for one day? No, the Great Man does not boast himself sincere, far from that; perhaps does not ask himself if he is so: I would say rather, his sincerity does not depend on himself; he cannot help being sincere!

Metaphysics is the attempt of the mind to rise above the mind.

The condition of the most passionate enthusiast is to be preferred over the individual who, because of the fear of making a mistake, won't in the end affirm or deny anything