Advice, Aramaic Proverb

If you steal from a thief, you also have a taste of it.

- Aramaic Proverb

Just because someone steals, you have no right to rob them. (Talmud Bavli, Berakoth, 5b)

도둑의 물건을 훔쳤다면, 역시 도둑이다.

- 아람 속담

http://en.wikiquote.org/wiki/Aramaic_proverbs