Science is for those who learn; poetry, for those who know.
The egoist does not tolerate egoism.
Interest, ambition, fortune, time, temper, love, all kill friendship.
Pleasure once tasted satisfies less than the desire experienced for its torments.
When unhappy, one doubts everything when happy one doubts nothing.
A face which is always serene possesses a mysterious and powerful attraction: sad hearts come to it as to the sun to warm themselves again.