Learning is experience. Everything else is just information.

Newton did not know what happened to the apple, and I can prove this when the next eclipse comes.

It is, in fact, nothing short of a miracle that the modern methods of instruction have not yet entirely strangled the holy curiosity of inquiry; for this delicate little plant, aside from stimulation, stands mainly in need of freedom; without this it goes to wrack and ruin without fail. It is a grave mistake to think that the enjoyment of seeing and searching can be promoted by means of coercion and a sense of duty.

If I had it [life] to do all over again, I'd have been a plumber.

Man would indeeded be in a poor way if he had to be restrained by fear of punishment and hope of reward after death.

As long as there are sovereign nations possessing great power, war is inevitable.

You must be aware that most men (and also not only a few women) are by nature not monogamous. This nature makes itself even more forceful when tradition and circumstance stand in an individual's way.