Revenge is a debt, in the paying of which the greatest knave is honest and sincere, and, so far as he is able, punctual.

Time is the measurer of all things, but is itself immeasurable, and the grand discloser of all things, but is itself undisclosed.

Words indeed are but the signs and counters of knowledge, and their currency should be strictly regulated by the capital which they represent.

Ambition is to the mind what the cap is to the falcon; it blinds us first, and then compels us to tower by reason of our blindness.

When the air balloon was first discovered, some one flippantly asked Dr. Franklin what was the use of it. The doctor answered this question by asking another: "What is the use of a new-born infant? It may become a man."

The interests of society often render it expedient not to utter the whole truth, the interests of science never: for in this field we have much more to fear from the deficiency of truth than from its abundance.

Be very slow to believe that you are wiser than all others; it is a fatal but common error. Where one has been saved by a true estimation of another's weakness, thousands have been destroyed by a false appreciation of their own strength.