How to forget my Bad Past?🤔

A person who was constantly unhappy about his past asked me “Please give me a solution for forgetting my bad past”. I replied “Pray to the Creator to bless you with Alzheimer’s Disease so that you will forget your bad past.”He replied immediately “But if I develop Alzheimer’s I will also forget my good past.”I smiled and replied “At present you have a good memory in which both the good and bad events are stored. But you seem to remember only the bad past and you have forgotten the good times. Even if you develop Alzheimer’s there are no good times for you to forget since you have already forgotten them,How can you lose something which have already lost.”Being Happy is by Choice and not Chance.”