There are times at random, when your mental harmony is disturbed for no reason whatsoever. Or that is what it apparently looks like.
Upon closer observation of yourself, you begin to understand the nature of the problem. Once you have identified, you can solve it easily.
The mental harmony cannot be restored by external factors, nor can it be disturbed by external factors. It is something that you need to restore through soul-searching, resolving internal conflicts, introspection etc. All this can happen when you spend some time with your self.
My mental equilibrium was suddenly disturbed yesterday for no apparent reason. Something had happened at the office front, and I was about to go into the same old trap. But after spending some quality time alone, with my self today I could control it.
I will act on things asap - without critically over-analyzing and over-assessing things. I will limit my thinking to things of the present, rather than the past. Future is what I make of present, so I am not worried much about it.