Swami Mukundananda
Why do I get angry and then regret it later?
Knowledge slips away, then regret
Anger is a flaw. When Maya, the material energy, attacks, you get angry because the knowledge that you should not be angry has left the intellect. When the knowledge comes back, you repent.
The knowledge that one should not be angry had slipped out of the intellect, so we made a mistake. Then, when the knowledge returned, we repented.