The biggest lie we tell ourselves is “I don‘t need to write this down because I will remember it.”

Freedom is man's capacity to take a hand in his own development. It is our capacity to mold ourselves.

The market is always right, and the price is never too high to buy or too low to sell.

解释：货卖完了才知道不足，是由于不懂得计量；事情结束了才知道有余，是由于不懂得调节。