In its efforts to learn as much as possible about nature, modern physics has found that certain things can never be "known" with certainty. Much of our knowledge must always remain uncertain. The most we can know is in terms of probabilities.

If all of this, all the life of a stream of water, can be nothing but a pile of atoms, how much more is possible?

I don't feel frightened by not knowing things, by being lost in the mysterious universe without any purpose - which is the way it really is, as far as I can tell. Possibly. It doesn't frighten me.

There is no harm in doubt and skepticism, for it is through these that new discoveries are made.

All theoretical chemistry is really physics; and all theoretical chemists know it.

People often think I'm a faker, but I'm usually honest, in a certain way--in such a way that often nobody believes me!

What would happen if we could arrange the atoms one by one the way we want them?