写作是一种勇气之举——你必须愿意暴露自己最深层的想法。
One ought never to turn one's back on a threatened danger and try to run away from it. If you do that, you will double the danger. But if you meet it promptly and without flinching, you will reduce the danger by half.
物理学的美丽在于它能够用简单的原理解释复杂的事物。