Art lives from constraints and dies from freedom.

You must grow in patience when you meet with great wrongs, and they will then be powerless to vex your mind.

One has no right to love or hate anything if one has not acquired a thorough knowledge of its nature. Great love springs from great knowledge of the beloved object, and if you know it but little you will be able to love it only a little or not at all.

He who does not oppose evil......commands it to be done.

Beyond a doubt truth bears the same relation to falsehood as light to darkness.

I am not to blame for putting forward, in the course of my work on science, any general rule derived from a previous conclusion.

People of higher talent work, even if they seem to do nothing