The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.
Without freedom, there is no creation, and without creation, there is no true life.
Mathematics is the poetry of logical ideas.
The mind is not a passive mirror of the world but an active participant in constructing reality.
真正的领导者不是创造追随者,而是创造更多的领导者。