“The need for gain, and advantage over others, is one of the chief driving forces behind all human misery.”

“If the driving force behind bettering human life is our insatiable desire to escape mortality what will we do when we succeed?”

“Experience: the vehicle of history. Teenagers: the driving force behind fatal accidents.”

“Everything that the human race has done and thought is concerned with the satisfaction of deeply felt needs and the assuagement of pain. One has to keep this constantly in mind if one wishes to understand spiritual movements and their development. Feeling and longing are the motive force behind all human endeavor and human creation, in however exalted a guise the latter may present themselves to us.”

“They believe one becomes selfless in love because one desires the advantage of another human being, often against one's own advantage. But in return for that they want to possess the other person.”

“I assert that the cosmic religious experience is the strongest and the noblest driving force behind scientific research.”