Youth is like spring, an over praised season more remarkable for biting winds than genial breezes. Autumn is the mellower season, and what we lose in flowers we more than gain in fruits.

There are two classes [of scientists], those who want to know, and do not care whether others think they know or not, and those who do not much care about knowing, but care very greatly about being reputed as knowing.

Flying. Whatever any other organism has been able to do man should surely be able to do also, though he may go a different way about it.

I fall asleep in the full and certain hope That my slumber shall not be broken; And that, though I be all-forgetting, Yet shall I not be all-forgotten, But continue that life in the thoughts and deeds of those I have loved.

Man, unlike the animals, has never learned that the sole purpose of life is to enjoy it.

History is a bucket of ashes.

Any fool can tell the truth, but it requires a man of some sense to know how to lie well.