"The most important thing in life is to have a common purpose."

"A mind that questions everything, unless strong enough to bear the weight of its ignorance, risks questioning itself and being engulfed in doubt."

"The fundamental categories of thought are of social origin."

"Irrespective of any external regulatory force, our capacity for feeling is in itself an insatiable and bottomless abyss."

"Every time a social phenomenon is directly explained by a psychological phenomenon, we may rest assured that the explanation is false."