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

The senses do not deceive us, but the judgment does.

Do the duty which lies nearest to thee.

Who longs in solitude to live, Ah! soon his wish will gain: Men hope and love, men get and give, and leave him to his pain.

Because everyone uses language to talk, everyone thinks he can talk about language.

One ought, everyday, to hear a song, read a fine poem, and, if possible, to speak a few reasonable words.

Originality provokes originality.