Six mistakes mankind keeps making century after century: Believing that personal gain is made by crushing others; Worrying about things that cannot be changed or corrected; Insisting that a thing is impossible because we cannot accomplish it; Refusing to set aside trivial preferences; Neglecting development and refinement of the mind; Attempting to compel others to believe and live as we do.
Marcus Tullius CiceroFriendship embraces innumerable ends; turn where you will it is ever at your side; no barrier shuts it out; it is never untimely and never in the way.
Marcus Tullius CiceroEven the ablest pilots are willing to receive advice from passengers in tempestuous weather.
Marcus Tullius Cicero