The great question which, in all ages, has disturbed mankind, and brought on them the greatest part of their mischiefs, has been, not whether there be power in the world, nor whence it came, but who should have it.
客人来了，主人不去招呼，他可能是个不知事理的傻子。
所有人类行为都有以下七个原因中的一个或多个：机会、自然、强迫、习惯、理性、激情和欲望。
Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.