Why should we allow rueful thoughts to ruin our happiness? Something went wrong but that should not mean that we should go after that. Leave that behind, shake off the stress.
The poet speaks like one who is very much sure of the earth's end. He sounds like one who awaits the destruction. He has no awe at the sight of the impending disaster of the earth in which he will also be part. Besides, he talks like someone who justifies the end of the earth.
"It was this desire for the freedom of my people to live their lives with dignity and self-respect that animated my life, that transformed a frightened young man into a bold one, that drove a law-abiding attorney to become a criminal, that turned a family-loving husband into a man without a home."