People should be more like animals . . . they should be more intuitive; they should not be too conscious of what they do while they do it.

Intellectual growth should commence at birth and cease only at death.

Never lose a holy curiosity.

All these constructions and the laws connecting them can be arrived at by the principle of looking for the mathematically simplest concepts and the link between them.

The history of scientific and technical discovery teaches us that the human race is poor in independent and creative imagination.

Even if you have to go through hell - go without hesitation.

The sceptic will say, 'It may well be true that this system of equations is reasonable from a logical standpoint, but this does not prove that it corresponds to nature.' You are right, dear sceptic. Experience alone can decide on truth.