Cultivate those who can teach you.
A gilded No is more satisfactory than a dry Yes.
Advice is sometimes transmitted more successfully through a joke than grave teaching.
Tis much to gain universal admiration; more, universal love.
The heaven of the envied is hell for the envious. [...because they focus on what they don't have rather than being grateful for what they have, which is always better than some others.]
It is profound philosophy to sound the depths of feeling and distinguish traits of character. Men must be studied as deeply as books.