The value of a commodity, or the quantity of any other commodity for which it will exchange, depends on the relative quantity of labor which is necessary for its production, and not on the greater or less compensation which is paid for that labor.

Interfaces keep things tidy, but don't accelerate growth: Functions do.

The mind evolves to meet the challenges of existence.

——《在山西实业界学界及各党派欢迎会的演说》（1912年9月20日）

我不在乎你说我什么，只要不是真的。