通往快樂的道路取決於兩個簡單的原則：發掘什麼是你有興趣並且擅長的事情，而當你找到後則整個人全心全意的投入 – 你的每一分力量及企圖心及天生的能力。The road to happiness lies in two simple principles: find what it is that interests you and that you can do well, and when you find it put your whole soul into it – every bit of energy and ambition and natural ability you have.

The road to happiness lies in two simple principles: find what it is that interests you and that you can do well, and when you find it put your whole soul into it – every bit of energy and ambition and natural ability you have.
– John D. Rockefeller, Industrialist
通往快樂的道路取決於兩個簡單的原則：發掘什麼是你有興趣並且擅長的事情，而當你找到後則整個人全心全意的投入 – 你的每一分力量及企圖心及天生的能力。
– 約翰‧洛克菲勒 (1839-1937) 美國早期創立了 Standard Oil (標準石油公司) ，是美國史上最有錢的人。