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

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

“It occurred to me by intuition, and music was the driving force behind that intuition. My discovery was the result of musical perception.”

“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?”

“When social critics deplore the materialism of our time and its preoccupation with money, fame, and superficial values, they overlook that the driving force behind the changes we have seen -- one of the greatest periods of change in history -- has been thought. It wasn't big bucks or social status that drove this change. It was, and is, the force of the play of the mind. As materialistic as we may be, playful thinking got us here.”