子夏曰：“日知其所无，月毋忘其所能，可谓好学也已矣。”
【译文】 子夏说：“每天都学到些新东西，每月都不忘所学会的东西，就算好学了。”
自然规律是亘古不变的，不会因尧的仁德而存在，不会因桀的暴虐而消亡。
We've had vicious kings, and we've had idiot kings, but I don't know if we've ever been cursed with a vicious idiot for a king!
Leadership is about making tough decisions today that will benefit generations tomorrow.
记住，希望是好事，甚至也许是人间至善。而美好的事永不消失。