Logic will get you from A to B. Imagination will take you everywhere.

The beauty of it is that we have to content ourselves with the recognition of the miracle, beyond which there is no legitimate way out.

Every kind of peaceful cooperation among men is primarily based on mutual trust and only secondarily on institutions such as courts of justice and police.

The world we have created is a product of our thinking; it cannot be changed without changing our thinking. If we want to change the world we have to change our thinking...no problem can be solved from the same consciousness that created it. We must learn to see the world anew.

We shall require a substantially new manner of thinking if mankind is to survive.

There is an atmosphere of well-sounding oratory that likes to attach itself to dress clothes. Away with it!

What distinguishes the language of science from language as we ordinarily understand the word? ... What science strives for is an utmost acuteness and clarity of concepts as regards their mutual relation and their correspondence to sensory data.