The test of a man or woman's breeding is how they behave in a quarrel.

History is not the past—it is the method we have evolved of organizing our ignorance of the past.

译文：读过的旧书要反复地阅读，读透读深才能知道书中的道理。赏析：经典的好书必须要反复阅读，常读常新，读懂书中的内容就会受益匪浅。

如果不衡量影响，我们只是在猜测可持续性。