Choose well. Your choice is brief, and yet endless.

Mathematicians are like Frenchmen: whatever you say to them they translate into their own language and forthwith it is something entirely different.

Each indecision brings its own delays and days are lost lamenting over lost days. Whatever you can do or think you can do, begin it. For boldness has magic, power, and genius in it.

Must it so be that whatever makes man happy must later become the source of his misery?

Character is formed in the stormy billows of the world.

That I be not as those are who spend the day in complaining of headache and the night in drinking the wine which gives the headache!

All theory dear friend is gray but the golden tree of life springs ever green.