I don't think you should ever have to apologize for your excitement.

To men like that, time was a surfeit, a barrel they watched slowly drain. When really, he thinks, it’s a glowing puddle you carry in your hands; you should spend all your energy protecting it.

成功的关键是在生活的各个方面不断成长——心理、情感、精神以及身体。

Life is just a series of trying to make up your mind.

统一自然界基本力的追求是现代物理学中最大的挑战之一。