I think we can safely assume that no one understands quantum mechanics.

There is one simplification at least. Electrons behave ... in exactly the same way as photons; they are both screwy, but in exactly in the same way.

To decide upon the answer is not scientific. In order to make progress, one must leave the door to the unknown ajar ajar only.

Maybe that is why young people make success. They don't know enough.

What I am going to tell you about is what we teach our physics students in the third or fourth year of graduate school... It is my task to convince you not to turn away because you don't understand it. You see my physics students don't understand it... That is because I don't understand it. Nobody does.

All mass is interaction.

If there is something very slightly wrong in our definition of the theories, then the full mathematical rigor may convert these errors into ridiculous conclusions.