If people should ever start to do only what is necessary millions would die of hunger.

With a pen in my hand I have successfully stormed bulwarks from which others armed with sword and excommunication have been repulsed.

Doubt must be no more than vigilance, otherwise it can become dangerous.

If all mankind were suddenly to practice honesty, many thousands of people would be sure to starve.

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.

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.

To grow wiser means to learn to know better and better the faults to which this instrument with which we feel and judge can be subject.