He who says he hates every kind of flattery, and says it in earnest, certainly does not yet know every kind of flattery.

The pleasures of the imagination are as it were only drawings and models which are played with by poor people who cannot afford the real thing.

There is no greater impediment to progress in the sciences than the desire to see it take place too quickly.

There is something in our minds like sunshine and the weather, which is not under our control. When I write, the best things come to me from I know not where.

I believe that man is in the last resort so free a being that his right to be what he believes himself to be cannot be contested.

The worst thing you can possibly do is worrying and thinking about what you could have done.

If another Messiah was born he could hardly do so much good as the printing-press.