You do not know anything until you have practiced.

I don't know what's the matter with people: they don't learn by understanding, they learn by some other way — by rote or something. Their knowledge is so fragile!

What I can't create I don't understand

Science is of value because it can produce something.

I'm going to play with physics, whenever I want to, without worrying about any importance whatsoever.

If an apple was magnified to the size of the Earth, then the atoms in the apple would be approximately the size of the original apple.

If you know that you are not sure, you have a chance to improve the situation. I want to demand this freedom for future generations.