学习的意愿是一种内在动机,其来源和奖励都在于其自身的实践。
容易得到的东西,是靠不住的;轻易许下的诺言,不值得信赖。
在科学中,最令人兴奋的短语不是“我发现了!”,而是“这有点奇怪...”
Love is free; to promise for ever to love the same woman is not less absurd than to promise to believe the same creed.
The power of words lies in their ability to evoke emotions.