Marquis de Condorcet quotes:

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.

[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.