Travel and society polish one, but a rolling stone gathers no moss, and a little moss is a good thing on a man.

Travel and society polish one, but a rolling stone gathers no moss, and a little moss is a good thing on a man.

旅行和社交可以磨光一个人，但是滚石不生苔，长一点苔对人是件好事。

-- John Burroughs 美国博物学家巴勒斯