To err is human also in so far as animals seldom or never err, or at least only the cleverest of them do so.

An hour-glass is a reminder not only of time's quick flight, but also of the dust to which we must at last return

The proof that man is the noblest of all creatures is that no other creature has ever denied it.

How did mankind ever come by the idea of liberty? What a grand thought it was!

If another Messiah was born he could hardly do so much good as the printing-press.

The writer who cannot sometimes throw away a thought about which another man would have written dissertations, without worry whether or not the reader will find it, will never become a great writer.

Most subjects at universities are taught for no other purpose than that they may be re-taught when the students become teachers.