Have no fear of perfection - you'll never reach it.
The keenest sorrow is to recognize ourselves as the sole cause of all our adversities.
I never think of the future - it comes soon enough.
You don't stop laughing because you grow old. You grow old because you stop laughing.
Nothing is particularly hard if you divide it into small jobs.
Whenever you have an efficient government you have a dictatorship.
Nothing contributes so much to tranquilizing the mind as a steady purpose - a point on which the soul may fix its intellectual eye.