I should . . . prefer swallowing one incomprehensibility rather than two. It requires one effort only to admit the single incomprehensibility of matter endowed with thought, and two to believe, first that of an existence called spirit, of which we have neither evidence nor idea, and then secondly how that spirit, which has neither extension nor solidity, can put material organs into motion.

You have heard of the new chemical nomenclature endeavored to be introduced by Lavoisier, Fourcroy, &c. Other chemists of this country, of equal note, reject it, and prove in my opinion that it is premature, insufficient and false. These latter are joined by the British chemists; and upon the whole, I think the new nomenclature will be rejected, after doing more harm than good. There are some good publications in it, which must be translated into the ordinary chemical language before they will be useful.

It is a principle that the right to a thing gives a right to the means without which it could not be used, that is to say, that the means follow their end.

It can never be too often repeated, that the time for fixing every essential right on a legal basis is while our rulers are honest, and ourselves united.

The chief purpose of government is to protect life. Abandon that and you have abandoned all.

By oft repeating an untruth, men come to believe it themselves.

The Christian religion, when divested of the rags in which they [the clergy] have enveloped it, and brought to the original purity and simplicity of it's benevolent institutor, is a religion of all others most friendly to liberty, science, and the freest expansion of the human mind.