I think a power to do something is of value. Whether the result is a good thing or a bad thing depends on how it is used, but the power is a value.

If you don't like it, go somewhere else, to another universe where the rules are simpler.

Our responsibility is to do what we can, learn what we can, improve the solutions, and pass them on.

To do any important work in physics a very good mathematical ability and aptitude are required. Some work in applications can be done without this, but it will not be very inspired. If you must satisfy your "personal curiosity concerning the mysteries of nature" what will happen if these mysteries turn out to be laws expressed in mathematical terms (as they do turn out to be)? You cannot understand the physical world in any deep or satisfying way without using mathematical reasoning with facility.

'Conservation' (the conservation law) means this ... that there is a number, which you can calculate, at one moment-and as nature undergoes its multitude of changes, this number doesn't change. That is, if you calculate again, this quantity, it'll be the same as it was before. An example is the conservation of energy: there's a quantity that you can calculate according to a certain rule, and it comes out the same answer after, no matter what happens, happens.

You do not know anything until you have practiced.

It's because somebody knows something about it that we can't talk about physics. It's the things that nobody knows anything about we can discuss.