只有发自内心,真正喜欢、热爱的事情,才会有百折不挠的勇气,去面对随之而来的问题和困难,在这样的情况下,一切问题最终都会迎刃而解。
无论多么复杂或精细,所有行为都可以用刺激和反应来解释。
The reason that the invisible hand often seems invisible is that it is often not there.
Every loaf of bread tells a story of craftsmanship and dedication.