Tonglen dissolves your solid sense of "I'm the wise person, I'm going to help this poor, unfortunate loser."
Pema ChodronMany people hope a spiritual practice will let them avoid what they are ashamed of. But when you hide something from yourself, you are going to project it onto your world. You continually find it in others and it becomes the source of prejudices and dogmatic views. On top of that, you feel bad about yourself, because you aren't the loving, open-minded, "spiritual" person you'd like to be.
Pema Chodron