Spacetime tells matter how to move; matter tells spacetime how to curve.

We all know that the real reason universities have students is in order to educate the professors.

The job of a theoretical physicist is to make mistakes as fast as possible .

To hate is to study, to study is to understand, to understand is to appreciate, to appreciate is to love. So maybe I'll end up loving your theory.

Surely where there's smoke there's fire? No, where there's so much smoke there's smoke.

Every heat engineer knows he can design his heat engine reliably and accurately on the foundation of the second law [of thermodynamics]. Run alongside one of the molecules, however, and ask it what it thinks of the second law. It will laugh at us. It never heard of the second law. It does what it wants. All the same, a collection of billions upon billions of such molecules obeys the second law with all the accuracy one could want

We will first understand how simple the universe is when we recognize how strange it is.