进步的关键在于坚持和挑战传统观念的意愿。

理论物理学不仅仅是解决问题，更是要找到正确的问题去解决。

And that's a lot of the reason why we care so much about our careers and indeed start caring so much about material goods. You know, we're often told that we live in very materialistic times, that we're all greedy people. I don't think we are particularly materialistic. I think we live in a society which has simply pegged certain emotional rewards to the acquisition of material goods. It's not the material goods we want;

真正的朋友是能看到你眼中痛苦的人，而其他人都只相信你脸上的笑容。