追求真理需要相当大的努力,这就是为什么只有很少人愿意出于对知识的热爱而去追求真理,尽管上帝在人的心灵中植入了对这种知识的自然渴望。
If you're not stubborn, you'll give up on experiments too soon. And if you're not flexible, you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.