Tetzaveh: Chapter 6
"Cease from man, though his breath be in his nostrils"

Rabbi Yehuda wonders if the title verse means that people should avoid one another, but Rabbi Shimon answers that God has cautioned people to guard themselves from those who have turned to evil. We learn that the Holy Spirit in man consists of three - Nefesh, Ruach and Neshamah, Neshamah being the highest of all, since it is a supernal force with which to know and keep the commandments of God. The only thing that can significantly damage the Neshamah and lead to idolatry is anger, which Rabbi Shimon warns us about strongly. He says that one must not even look at the face of an angry man, and should certainly not associate with him.