The Parable of the Weary Traveler.

Once, long ago, a traveler was walking.
He walked from nowhere and was bound for nowhere, because he did not remember his past and did not wish to see the future.
Others passed him by, talking, telling stories, discussing among themselves, laughing and grieving. He could not sustain any conversation, feeling a vast chasm between them.
That chasm grew larger, more visible. He moved farther and farther away from people. Trying to understand who he was and where he was going, he considered himself different, unlike the others, strange, mistaken — and therefore unworthy of company with the majority in which he so desperately tried to find himself.
He thought about it so intensely that he came to believe in his hopelessness and the fatality of his path; he could not understand why such a fate had been sent to him. He invented a past in which he was constantly to blame, and thus he bore his burden.
But one day a boy approached him and asked where he was heading. The traveler answered,
“I must correct my mistakes. I must find myself.”
“And what have you done?”
“I don’t remember. I can’t recall at all, but I know I am paying for the past now, since I cannot find my place among others.”
“If you don’t remember the past, how can you say that you are worse off now than then, that now you are the one being punished?”
The traveler shrugged; he had nothing to answer the boy.
And he realized that the specifics of the past did not matter.
How many of you know where you came from and where you are going?
In this, he was no different from those who remembered their years lived and planned the future.
But that boy pointed out a way forward, and in that way he recognized his true mission: to give thanks for the experience lived, to ask for guidance for the future in order to avoid repeating former lessons, and to enjoy the present in which he felt himself wholly.
The moment here and now opened for him in an entirely new way.
Look around: how many wars, calamities, illnesses, wanderings, misfortunes, disasters, sufferings… How much there is on your planet! Too much to count. You cannot live through it all in a single lifetime. But if all that were compressed into the experience of a single soul, imagine how unbearably heavy that burden would be. So why do you think it is especially heavy for you now?
When you think it is hard for you, remember the faces of those inconsolable ones who dwell in painful turmoil and torment. Do not complain or grumble, and do not seek to punish yourself where you have been given a lesson. Learn to look upon this world with the eyes of truth.