Learn of the skillful; he that teaches himself, has a fool for his master.

Those who would trade in their freedom for their protection deserve neither.

That 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.

Perhaps the history of the errors of mankind, all things considered, is more valuable and interesting than that of their discoveries. Truth is uniform and narrow; it constantly exists, and does not seem to require so much an active energy, as a passive aptitude of the soul in order to encounter it. But error is endlessly diversified; it has no reality, but is the pure and simple creation of the mind that invents it. In this field the soul has room enough to expand herself, to display all her boundless faculties, and all her beautiful and interesting extravagancies and absurdities.

Some make Conscience of wearing a Hat in the Church, who make none of robbing the Altar.

My refusing to eat meat occasioned inconveniency, and I have been frequently chided for my singularity. But my light repast allows for greater progress, for greater clearness of head and quicker comprehension.

Virtue and Happiness are Mother and Daughter.