It is the infinite alone that cannot be attained, for if it could it would become finite.

Those who are enamoured of practice without science are like a pilot who goes into a ship without rudder or compass and never has any certainty of where he is going. Practice should always be based upon a sound knowledge of theory.

The human being, creature of eyes, needs the image.

To lie is vile, to tell truth is excellent, if not noble.

One has no right to love or hate anything if one has not acquired a thorough knowledge of its nature. Great love springs from great knowledge of the beloved object, and if you know it but little you will be able to love it only a little or not at all.

Supreme happiness will be the greatest cause of misery, and the perfection of wisdom the occassion of folly.

Inaction saps the vigor of the mind.