勿れ

小事を軽んずるなかれ。

Take care of the pence and the pounds will take care of themselves.

物事は中途半端にするなかれ。

Don't leave things half done.

己(おのれ)の欲せざる所(ところ)は人(ひと)に施す勿れ。

Do to others as you would have others do to you.

鶏口となるも牛後となるなかれ。

Better be the head of a dog than the tail of a lion.

過ちては改むるに憚ることなかれ。

It's never too late to make amends.