有人告诉我在我书中每个方程式将会降低一半的销售量。结果,我确实放了一个方程式——爱因斯坦著名的等式,E=mc2。我发现这并没有吓跑我一半的潜在读者。
The greatest happiness for the laborer consists in having an abundant supply of the necessaries of life.
The greatest killer of happiness is comparison. If you must compare, compare yourself to you yesterday