Physics is really nothing more than a search for ultimate simplicity, but so far all we have is a kind of elegant messiness.

Protons give an atom its identity, electrons its personality.

You may not feel outstandingly robust, but if you are an average-sized adult you will contain within your modest frame no less than 7 X 10^18 joules of potential energy—enough to explode with the force of thirty very large hydrogen bombs, assuming you knew how to liberate it and really wished to make a point.

Energy is liberated matter, matter is energy waiting to happen.

A mathematician is an individual who constructs space with 0D particles and then places a bowling ball on this invisible canvas to explain how gravity works.

We are the last generation of humans on Earth!