Live always in the best company when you read.
Learn from the earliest days to insure your principles against the perils of ridicule; you can no more exercise your reason if you live in the constant dread of laughter, than you can enjoy your life if you are in the constant terror of death.
Errors to be dangerous must have a great deal of truth mingled with them. It is only from this alliance that they can ever obtain an extensive circulation.
Have the courage to be ignorant of a great number of things, in order to avoid the calamity of being ignorant of everything.
I have no relish for the country; it is a kind of healthy grave.
Whatever you are from nature, keep to it; never desert your own line of talent. Be what nature intended you for, and you will succeed; be anything else, and you will be ten thousands times worse than nothing.
Life is to be fortified by many friendships. To love and to be loved is the greatest happiness of existence.
It is always right that a man should be able to render a reason for the faith that is within him.
You must not think me necessarily foolish because I am facetious, nor will I consider you necessarily wise because you are grave.