If a man will begin with certainties, he shall end in doubts, but if he will content to begin with doubts, he shall end in certainties.

I hold every man a debtor to his profession; from the which as men of course do seek to receive countenance and profit, so ought they of duty to endeavor themselves, by way of amends, to be a help and ornament thereunto.

A principal fruit of friendship, is the ease and discharge of the fullness and swellings of the heart, which passions of all kinds do cause and induce.

But by far the greatest obstacle to the progress of science and to the undertaking of new tasks and provinces therein is found in this-that men despair and think things impossible.

He of whom many are afraid ought himself to fear many.

When a man laughs at his troubles he loses a great many friends. They never forgive the loss of their prerogative.

My praise shall be dedicated to the mind itself. The mind is the man, and the knowledge is the mind. A man is but what he knoweth. The mind is but an accident to knowledge, for knowledge is the double of that which is.