“If you wish to succeed in life, make perseverance your bosom friend, experience your wise counselor, caution your elder brother, and hope your guardian genius”

“They know enough who know how to learn”

“The utmost extent of man's knowledge, is to know that he knows nothing”

“Animals, in their generation, are wiser than the sons of men; but their wisdom is confined to a few particulars, and lies in a very narrow compass”

“The hours of a wise man are lengthened by his ideas”

“Be wise with speed; a fool at forty is a fool indeed”