All Mass Is Interaction.

I Don't Believe I Can Really Do Without Teaching. The Reason Is, I Have To Have Something So That When I Don't Have Any Ideas And I'm Not Getting Anywhere, I Can Say To Myself, "at Least I'm Living; At Least I'm Doing Something. I'm Making Some Contribution." It's Just Psychological.

I'm Trying To Find Out Not How Nature Could Be, But How Nature Is.

Mathematics Is A Language Plus Reasoning. It's Like A Language Plus Logic. Mathematics Is A Tool For Reasoning.

One Cannot Understand... The Universality Of Laws Of Nature, The Relationship Of Things, Without An Understanding Of Mathematics. There Is No Other Way To Do It.

If It Disagrees With Experiment, It's Wrong.