Self-love, then, is a necessary principle of action.
解释:大部分鸟类都是雄性的,而雌鸽却是雌性的,说明了鸟类性别的特殊性。
最佳的投资机会往往来自正在经历快速变革的行业,传统参与者适应缓慢的地方。
最具韧性的经济体是那些投资于所有人的经济体。
The duty of man is the same in respect to his own nature as in respect to the nature of all other things.
 Knowledge is the key to unlocking the door to the soul.