Man's most serious activity is play.
Love, whether sexual, parental, or fraternal, is essentially sacrificial, and prompts a man to give his life for his friends.
The highest form of vanity is love of fame.
The aim of education is the condition of suspended judgment on everything.
Repetition is the only form of permanence that Nature can achieve.
Fanaticism consists of redoubling your effort when you have forgotten your aim.