Patriotism ruins history.

It is not enough to have knowledge; one must apply it. It is not enough to have wishes; one must also accomplish it.

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

Create, artist, do not talk.

We are never deceived; we deceive ourselves.

Let everyone sweep in front of his own door, and the whole world will be clean.

Unlike grown ups, children have little need to deceive themselves.