The way in which men produce their means of subsistence depends first of all on the nature of the actual means they find in existence and have to reproduce.
The world is full of obvious things which nobody by any chance ever observes.
做你热爱的事，热爱你所做的事。
I don't know what I want. I am inconsistent, non-committal, passive; I like the indefinite, the boundless; I like continual uncertainty.
Psychology must be based on observable phenomena, not abstractions.