Many of the things you can count, don't count. Many of the things you can't count, really count.
Each makes this cosmos and its construction the pivot of his emotional life, in order to find in this way peace and security which he can not find in the narrow whirlpool of personal experience.
He who joyfully marches to music in rank and file has already earned my contempt. He has been given a large brain by mistake, since for him the spinal cord would fully suffice. This disgrace to civilization should be done away with at once. Heroism at command, senseless brutality, and all the loathsome nonsense that goes by the name of patriotism, how violently I hate all this, how despicable and ignoble war is; I would rather be torn to shreds than be part of so base an action! It is my conviction that killing under the cloak of war is nothing but an act of murder.
Great spirits have always encountered violent opposition from mediocre minds.
The process of scientific discovery is, in effect, a continual flight from wonder.
All meaningful and lasting change starts first in your imagination and then works its way out. Imagination is more important than knowledge.
Watch the stars, and from them learn. To the Master's honor all must turn, each in its track, without a sound, forever tracing Newton's ground.
Our death is not an end if we can live on in our children and the younger generation. For they are us, our bodies are only wilted leaves on the tree of life.
Let every man be respected as an individual and no man idolized.
Nothing will benefit human health and increase the chances for survival of life on Earth as much as the evolution to a vegetarian diet.
The secret to creativity is knowing how to hide your sources.
I am enough of an artist to draw freely upon my imagination. Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
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.
Common sense is the collection of prejudices acquired by age eighteen.
If we knew what it was we were doing, it would not be called research, would it?