Correction does much, but encouragement does more.
If a man writes a book, let him set down only what he knows. I have guesses enough of my own.
We are never deceived; we deceive ourselves.
Mathematicians are like Frenchmen: whatever you say to them they translate into their own language and forthwith it is something entirely different.
Whoever, in middle age, attempts to realize the wishes and hopes of his early youth, invariably deceives himself. Each ten years of a man's life has its own fortunes, its own hopes, its own desires.
To live as one likes is plebian the noble man aspires to order and law.
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