When words lose their meaning, people lose their liberty.

At fifteen my mind was directed to study, and at thirty I knew where to stand.

Of course you want to be rich and famous. It's natural. Wealth and fame are what every man desires. The question is: What are you willing to trade for it?

I am not concerned that I am not known, I seek to be worthy to be known.

To take what you know for what you know, and what you do not know for what you do not know, that is knowledge indeed.

The young should be dutiful at home, modest abroad, careful and true, overflowing in kindness for all, but in brotherhood with love. And if they have strength to spare they should spend it on the arts.

The Essence of Knowledge is, having it, to use it.