Swami Mukundananda
How do I let go of hatred and the urge to get back at someone who hurt me?
Check your intention, leave them to God
When you want to teach someone a lesson, check your real intention. If it is only to feel good, that is usually resentment, so leave that person in God's hands and take care of your own life.
You have to be very careful in reading your intention: why am I trying to teach this person a lesson? Is it just so that it makes me feel good? Usually that is what resentment is.