我们必须保持警惕，坚决与一切内外敌人作斗争。
We must be vigilant and resolutely fight against all enemies, both internal and external.
The task of economics is not only to interpret phenomena, but also to provide practical advice and policies for society.
Power is not given to you. You have to take it.
Seeing, hearing, and remembering are all acts of construction.
Education begins the gentleman, but reading, good company and reflection must finish him.
没有欲念称为圣人，欲念少称为贤人，欲念多是凡人，而纵欲则是狂人。