There would be times when negative thoughts arise in our minds out of nowhere. There is no reason for us to feel negative and yet we still do. Events that happened ages that we almost forgot about come back haunting us with regret and anger.
However, if we take a step back and think logically, all the havoc seem to arise only in the mind. There is nothing really happening outside the mind but yet all this spontaneous emotional turmoil makes us feel like "crap". It depresses us to a certain extent and brings our energy down. Sometimes this feeling can last for days or even weeks.
Could this be a form of purification? I understand that our negative karma do not just evaporate into thin air even if we do virtuous actions to purify them. We need to suffer it out in order for it to be purified. Others get accidents, their money stolen or fall sick as purification of their negative karma I was told.
What does everyone think?
Yes, I believe it is a form of purification.
I remember when I did my first prostration retreat, being really new to Tibetan Buddhism (actually, Buddhism in general)... I asked some of the senior students all about prostrations. I knew it was for purification, but I didn't know how it was going to be! So to be prepared on what's probably coming my way, I asked the seniors on what will happen during a purification retreat (which by the way, a rather redundant question as all people have different levels of karma so they experience differently)
It was here that I learned and understood what is purification and how doing a prostration retreat allows us to exhaust our negative karma in a controlled environment. One of such purification process that we may experience during these retreats are emotional turmoils.
For example, if we have the karma to meet with a terrible car accident, then through purification in a controlled manner, instead of experienceing it real life, we may experience it in a dream. The shock, fear etc from the dream is equally traumatic/scary as it is in real life. So, instead of experiencing the actual thing, we experience it in a more controlled place.