Time, undoubtedly is the greatest healer. You tend to forget things with time.
Thoughts of the past fade away, unknowingly, healing up your wounds
At times, when something affects you badly, you break down. But as the clock ticks, days and nights pass, the balm of time is rubbed on you and that is automatic, effortless and is bound to happen.
At the first instance when things go wrong, pessimistic feelings come from everywhere but sooner or later you overcome it and forget the past. And definitely, you become a stronger person and realize that if I could bear this, nothing else can bother me in future.