To invent something, all you need is imagination and a big pile of junk.

I do not believe that a moral philosophy can ever be founded on a scientific basis. … The valuation of life and all its nobler expressions can only come out of the soul’s yearning toward its own destiny. Every attempt to reduce ethics to scientific formulas must fail. Of that I am perfectly convinced.

We act as though comfort and luxury were the chief requirements of life. All that we need to make us happy is something to be enthusiastic about.

What counts can't always be counted; what can be counted doesn't always count.

The world will not be destroyed by those who do evil, but by those who watch them without doing anything.

Student is not a container you have to fill but a torch you have to light up.

Imagination rules the earth