Life is not always easy. Most people encounter circumstances that derail them either for part of their lives or for good: the death of a family member; a ruined relationship, broken engagement, marriage; even the loss of a job or a long-sought opportunity.
The old platitude’s that you’ll get over it, time heals all wounds, live and learn–these don’t help you get through they day, do they?
So, people resort to drugs or alcohol or seek some distraction to take their minds off it, but the wound never really heals on its own.
The reason why, and the solution, are contained in Dianetics and this video, which serves as an introduction to to the subject, is a good place to start to understand it.
Hope it helps.