If you know, say you know. If you don't know, say you don't know.

Surely it is the maxim of loving-kindness: Do not unto others that you would not have them do unto you.

The chase of gain is rich in hate

We should feel sorrow, but not sink under its oppression.

To learn and from time to time to apply what one has learned - isn't that a pleasure?

Music produces a kind of pleasure which human nature cannot do without.

Without knowing the force of words, it is impossible to know more.