It is not from the benevolence of the butcher， the brewer， or the baker， that we expect our dinner， but from their regard to their own self-interest.
我們不能借著肉販，啤酒商或面包師的善行而獲得晚餐，而是源于他們對自身利益的看重。
"Every saint has a past, and every sinner has a future."
在分子水平上理解疼痛為靶向治療打開了大門。