It is one of the biggest blessing that you can be stupid with your true friends and behave like you shame to do elsewhere

We fill the hands and nurseries of our children with all manner of dolls, drums and horses, withdrawing their eyes from the plain face and... Nature, the sun and moon, the animals, the water and stones, which should be their toys.

There was never anything that did not proceed from a thought.

But lest I should mislead any when I have my own head and obey my whims, let me remind the reader that I am only an experimenter.Do not set the least value on what I do, or the least discredit on what I do not, as if I pretended to settle any thing as true or false. I unsettle all things. No facts are to me sacred; none are profane; I simply experiment, an endless seeker with no Past at my back.

Isolation must precede true society.

Great men exist that there might be greater men.

Knowledge, Virtue, Power are the victories of man over his necessities, his march to the dominion of the world.