Science will stagnate if it is made to serve practical goals.

A theory is something nobody believes, except the person who made it. An experiment is something everybody believes, except the person who made it.

If I had my life to live over again, I would elect to be a trader of goods rather than a student of science. I think barter is a noble thing.

Common sense is that layer of prejudices which we acquire before we are sixteen.

Men should continue to fight, but they should fight for things worth while, not for imaginary geographical lines, racial prejudices and private greed draped in the color's of patriotism.

When you won't be able to describe it simply just, you don't are aware of it well sufficient.

Relativity teaches us the connection between the different descriptions of one and the same reality.