Under the freest constitution ignorant people are still slaves.

I hope to see the bringing together of all the best educated people of the earth into a worldwide Congress of Scientists.

Enjoy your own life without comparing it with that of another.[or you will create disappointment and envy, as every other person has something, small or large, better than you. Remember at these times what you have rather than what you don't and be grateful]

Men do not often dare to avow, even to themselves, the slow progress reason has made in their minds; but they are ready to follow it if it is presented to them in a lively and striking manner, and forces them to recognize it.

[All phenomena] are equally susceptible of being calculated, and all that is necessary, to reduce the whole of nature to laws similar to those which Newton discovered with the aid of the calculus, is to have a sufficient number of observations and a mathematics that is complex enough.

Enjoy your own life without comparing it with that of another.

People still retain the errors of their childhood, their nation, and their age, long after they have accepted the truths needed to refute them.