Once you teach people to say what they do not understand, it is easy enough to get them to say anything you like. v One could wish no easier death than that of Socrates, calmly discussing philosophy with his friends; one could fear nothing worse than that of Jesus, dying in torment, among the insults, the mockery, the curses of the whole nation. In the midst of these terrible sufferings, Jesus prays for his cruel murderers. Yes, if the life and death of Socrates are those of a philosopher, the life and death of Christ are those of a God.

Chemistry... is like the maid occupied with daily civilisation; she is busy with fertilisers, medicines, glass, insecticides ... for she dispenses the recipes.

Teach your scholar to observe the phenomena of nature; you will soon rouse his curiosity, but if you would have it grow, do not be in too great a hurry to satisfy this curiosity. Put the problems before him and let him solve them himself. Let him know nothing because you have told him, but because he has learnt it for himself. Let him not be taught science, let him discover it. If ever you substitute authority for reason he will cease to reason; he will be a mere plaything of other people's thoughts.

The tone of good conversation is brilliant and natural; it is neither tedious nor frivolous; it is instructive without pedantry, gay without tumultuousness, polished without affectation, gallant without insipidity, waggish without equivocation.

I prefer liberty with danger than peace with slavery.

Money is the seed of money, and the first guinea is sometimes more difficult to acquire than the second million.

God made me and broke the mold.