Product is 1, marketing is 0. Without a good product, no amount of marketing is futile.
译文：内心澄净，我们做事就会明澈如水，就像平静的水面能映照万物一般；品行高洁，我们就会脱俗，如同流云飘过无碍的天空。赏析：静以修身，俭以养德。一个人的内心纯净，做事就会光明磊落，品行高洁的人，就如同美玉一般，经得住风吹雨打，耐得住岁月的冲刷和考验。
我们存在，只为改变世界。
A wise man said， “Before you speak， let your words pass through three gates. At the first gate， ask yourself， “Is it true？” At the second gate ask， “Is it necessary？” At the third gate ask， “Is it kind？”
"The joy of writing is in the discovery of the unknown."
大屠杀不是你能描述的东西，它是你只能幸存的东西。
"Causal inference requires careful thought about the assumptions underlying your analysis."