He confronted himself to face the difficulties.

Einstein's theory of relativity forms the basis of physics.

His success is relative to his efforts.

He is good at explaining that theory.

General relativity is a theory of physics proposed by Einstein.

I can't see an end to the argument with him.

He is supporting that theory.

We gathered to discuss that issue.

Bose-Einstein statistics is one of the important concepts in quantum mechanics.

The distinctiveness of this project sets it apart from other projects.