Isn't this what we all search for?
.....long for?
Real tranquility will only come when we face ourselves head on....
And for this the first step is self-acceptance - be it a self gone wrong--either by one's own self or by others, or a self that has moved into being judgmental, or a self that is helpful and kind................never mind....this is the only self we have, and if things are not going in a manner to allow for tranquility, then we will need to face that fact first.
Next - and this is the hard part. We have to summon up the courage to accept that we are imperfect, that we have not been leading an authentic life true to our own beliefs and values, that we have not been living as we ought but are trying to live as someone else wishes/dictates/desires/dreams, and that we are terribly vulnerable emotionally.
After this accepting comes the fixing...repairing...healing...carrying on living...
Point to remember: This is not a one-time thing. Us going off the rails, losing our tranquility is going to happen again and again. So, sensitivity to our inner climate is very necessary. And no matter what......no matter how dark or how deep, no matter how bright or beautiful, we can once again regain our equanimity and serenity....we owe this to ourselves, do we not?