When life seems hard, the courageous do not lie down and accept defeat; instead, they are all the more determined to struggle for better future.
Mathematics is not a spectator sport; you have to play to understand.
所以从前的贤君按照农事来生财,巩固根本并节约用度,财务自然就丰足了。
艺术是提出问题的方式,而不是给出答案。
If you don’t fail now and again, you’re not trying hard enough.