Six mistakes mankind keeps making century after century:
1. Believing that personal gain is made by crushing others;
2. Worrying about things that cannot be changed or corrected;
3. Insisting that a thing is impossible because we cannot accomplish it;
4. Refusing to set aside trivial preferences;
5. Neglecting development and refinement of the mind;
6. Attempting to compel others to believe and live as we do.
If anyone says that the best life of all is to sail the sea, and then
adds that I must not sail upon a sea where shipwrecks are a common
occurrence and there are often sudden storms that sweep the helmsman in
an adverse direction, I conclude that this man, although he lauds
navigation, really forbids me to launch my ship.