History reports that the men who can manage men manage the men who can manage only things, and the men who can manage money manage all.

Every science begins as philosophy and ends as art; it arises in hypothesis and flows into achievement.

Time sanctifies everything; even the most arrant theft in the hands of the robber's grandchildren becomes sacred and inviolable property.

The ego is willing but the machine cannot go on. It's the last thing a man will admit, that his mind ages.

Civilizaton is the interval between Ice Ages.

Science gives us knowledge, but only philosophy can give us wisdom.

To speak ill of others is a dishonest way of praising ourselves; let us be above such transparent egotism. If you can't say good and encouraging things, say nothing. Nothing is often a good thing to do, and always a clever thing to say.