The most sustainable product is the one that already exists.

译文：做将帅的切勿骄傲自大，如果骄傲自大，待人接物就会有不周道的地方，有失礼之处，一朝失礼就会众叛亲离，人心愤懑相怨。

"A story is a letter that the author writes to himself, to tell himself things that he would be unable to discover otherwise."

解释：大树不能生长在屋脊上，松柏不能生长在矮墙上。

在科学研究中，坚持比才华更重要。