Your most unhappy customers are your greatest source of learning.
【译文】君子成全别人的好事，不帮助别人做成坏事。小人与此相反。
"The poet is the priest of the invisible."
自守表示的研究是进入数学隐藏模式的旅程。
你必须愿意失败才能成功。
The best way to avoid mistakes is to gain experience.