At some point in our lives, many of us begin to ask questions about unresolved issues around human life. If God is good, how is suffering explained? How is birth into some awful place or terrible family explained? How are horrendous deformities and illnesses explained? Why do some die very young, yet some angry person lives to old age? Why do some, who claim to be religious, do violent things such as inquisitions? Etc etc etc....
There are several possibilities. God is not good and loving afterall. I reject this possibility. Another is that this life is not a one time through experience, but one of many, each teaching us different lessons until we are finally refined, shedding all that is not Godlike.
I began a serious look into the possibility of rebirth many decades ago when I read an article in "Psychology Today" magazine that featured the research of Ian Stevenson at a university. He had several thousand cases of small children remembering their previous lives, often with exquisite detail, and also verified. Now there are numerous studies, anecdotal accounts and a pile of books and YouTube videos on the subject.
I urge you to look into this important subject. I'm personally convinced that this is not a one time event. From my studies and personal experiences I know there is more than one current life.