All religions, arts, and sciences are branches of the same tree. All these aspirations are directed toward ennobling man's life.
As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.
Every one who is seriously engaged in the pursuit of science becomes convinced that the laws of nature manifest the existence of a spirit vastly superior to that of men, and one in the face of which we with our modest powers must feel humble.
I am not an Atheist. I do not know if I can define myself as a Pantheist. The problem involved is too vast for our limited minds.
I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.
I look upon myself as a man. Nationalism is an infantile disease. It is the measles of mankind.
If A is success in life, then A = x + y + z. Work is x, play is y, and z is keeping your mouth shut.
Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
It has often been said, and certainly not without justification, that the man of science is a poor philosopher.
It is...nothing short of a miracle that the modern methods of instruction have not yet entirely strangled the holy curiosity of inquiry.
Never do anything against conscience even if the state demands it.
One may say [that] the eternal mystery of the world is its comprehensibility.
Science without religion is lame, religion without science is blind.
The important thing is not to stop questioning. Curiosity has its own reason for existence.
The true value of a human being is determined primarily by the measure and the sense in which he has attained to liberation from the self.
The world is more threatened by those who tolerate and encourage evil than by the evildoers themselves.
There is no logical path to these laws [of physics]; only intuition, resting on sympathetic understanding of experience, can reach them.
When a man sits with a pretty girl for an hour, it seems like a minute. But let him sit on a hot stove for a minute and it's longer than any hour. That's relativity.
Why is it nobody understands me and everybody likes me?