Peace is our passion.

The advocate of religious freedom is to expect neither peace nor forgiveness from [the clergy].

My only fear is that I may live too long. This would be a subject of dread to me.

The people of every country are the only safe guardians of their own rights, and are the only instruments which can be used for their destruction. And certainly they would never consent to be so used were they not deceived. To avoid this they should be instructed to a certain degree.

Never suppose that in any possible situation or under any circumstances that it is best for you to do a dishonorable thing however slightly so it may appear to you... Encourage all your virtuous dispositions, and exercise them whenever an opportunity arises, being assured that they will gain strength by exercise ... and that exercise will make them habitual.

Speaking one day to Monsieur de Buffon, on the present ardor of chemical inquiry, he affected to consider chemistry but as cookery, and to place the toils of the laboratory on the footing with those of the kitchen. I think it, on the contrary, among the most useful of sciences, and big with future discoveries for the utility and safety of the human race.

In a republican nation whose citizens are to be led by reason and persuasion and not by force, the art of reasoning becomes of first importance.