The mind is not a vessel to be filled but a fire to be kindled.
Those are greedy of praise prove that they are poor in merit.
When the strong box contains no more both friends and flatterers shun the door.
Barba non facit philosophum
If Nature be not improved by instruction, it is blind; if instruction be not assisted by Nature, it is maimed; and if exercise fail of the assistance of both, it is imperfect.
Friendship requires a steady, constant, and unchangeable character, a person that is uniform in his intimacy.