How Can You Recognize the Yetzer Hara?

The Yetzer Hara (inclination for evil) very many times seems to you a good pal. He sits next to you in the synagogue wearing a black hat and a beard; and he’s talking Loshon Hara [forbidden speech] to you in the synagogue. That’s the enemy. — Contending with the Yetzer Hara (#E-788)