If we knew what it was we were doing, it would not be called research, would it?

Student: Dr. Einstein, Aren't these the same questions as last year's [physics] final exam? Dr. Einstein: Yes; But this year the answers are different.

No one must think that Newton’s great creation can be overthrown in any real sense by this [Theory of Relativity] or by any other theory. His clear and wide ideas will for ever retain their significance as the foundation on which our modern conceptions of physics have been built.

Wisdom is not a product of schooling but of the lifelong attempt to acquire it.

I am satisfied with the mystery of the eternity of life.

The supreme goal of all theory is to make the irreducible basic elements as simple and as few as possible without having to surrender the adequate representation of a simple datum of experience.

I have made the Bhagwad Gita as the main source of my inspiration and guide for the purpose of scientific investigations and formation of my theories.