Win for yourself that which your fathers have won.

When the boy begins to understand that the visible point is preceded by an invisible point, that the shortest distance between two points is conceived as a straight line before it is ever drawn with pencil and paper...the fountain of all thought has been opened to him...the philosopher can reveal him nothing new, as a geometrician he has discovered the basis of all thought.

Hypotheses are lullabies for teachers to sing their students to sleep.

Don't say that you want to give, but go ahead and give! You'll never catch up with a mere hope.

Still this planet's soil for noble deeds grants scope abounding.

I reverence the individual who understands distinctly what he wishes; who unweariedly advances, who knows the means conducive to his object, and can seize and use them.

Art is in itself noble; that is why the artist has no fear of what is common. This, indeed, is already ennobled when he takes it up.