Life, when is spent well, is long.

No human investigation can be called real science if it cannot be demonstrated mathematically.

I am never weary of being useful... In serving others I cannot do enough. No labor is sufficient to tire me.

He who can copy can do.

The length of a man's outspread arms is equal to his height.

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.

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.