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.

In business, as in life, you have to trust your instincts and take calculated risks.

对黑洞的研究彻底改变了我们对空间和时间的理解。