Be aware your actions have an impact

Yaakov was afraid he would be killed by Esav, and Rashi adds that he was also distressed, afraid he might have to kill. Rav Moshe Feinstein asks what was wrong with that, since fighting evil is exactly the task. His answer is a warning for anyone who is sure he is in the right, and it reaches Shimon and Levi in Shechem. A comparison between a housewife and a cat sorts out two kinds of zealots.