People who don't feel 'sorry' and/or 'guilt' of the wrongdoings are the one who are happy in life. This is one part of the human psychology. The feeling of 'no guilt' brings additional desires. No repentance, and they just move on, until when nobody knows. People who have a feeling of guilt are the people who are less happy, and have no such additional plainly desires. But then again, human behavior, psychology and philosophy coming together is such a vague thing.
This is a beautiful post @sauravrungta. True to your lines, "Maybe in understanding others, I will be able to understand myself too". That's what we all should be doing.
That's a really good point and I agree with it. Sad that such times have befallen humanity.