According to the blue man, What is the purpose of heaven - the greatest gift of God - and how does it tie in with the title?

According to the Blue Man, the purpose of Heaven is understanding the life you lived..... the understanding itself will come from the five people you meet there.

"Each of us was in your life for a reason. You may not have known the reason at the time, and that is what heaven is for. For understanding your life on earth."

"This is the greatest gift God can give you: to understand what happened in your life. To have it explained. It is the peace you have been searching for."