I have no private interest in the reception of my inventions by the world, having never made, nor proposed to make, the least profit by any of them.

Money has never made man happy, nor will it, there is nothing in its nature to produce happiness. The more of it one has the more one wants.

Again, He that sells upon Credit, asks a Price for what he sells, equivalent to the Principal and Interest of his Money for the Time he is like to be kept out of it: therefore

As we enjoy great advantages from the inventions of others, we should be glad of an opportunity to serve others by any invention of ours, and this we should do freely and generously.

I never did anything by accident, nor did any of my inventions come by accident; they came by work.

I have never entered into any controversy in defense of my philosophical opinions; I leave them to take their chance in the world. If they are right, truth and experience will support them; if wrong, they ought to be refuted and rejected. Disputes are apt to sour one's temper and disturb one's quiet.