The reasons you need to believe in reincarnation are eight fold...
It is the most logical conception of afterlife, it is the only conception of afterlife that is not fucking stupid. It is the most desirable afterlife, and we don't live in the reality where God would give us anything but the best afterlife. We don't live in the stupid reality. All of the people who receive psychic visions and have other such intuitive "magical" abilities speak of things such as your soul age like it is a given. I know your next thought is "You trust these charlatans to know what they're talking about?" and past me would agree with you however present me has seen undeniable proof of it's validity and realizes that while they do often hold all varieties of magical thinking not one of them questions reincarnation for a second. Reincarnation is the standard, it is a given, every last one of them agrees. There are many documented cases of people under hypnosis recalling past lives. Please do not start with "People under hypnosis are very suggestible" and then just dismiss the entire concept of hypnosis because of it, it's just the programmed response we use to deny the entire idea of the validity of hypnosis, incestual child rapists really like that one. Hypnosis is not always suggestion just because it is sometimes suggestion. There's more to hypnosis than making people do stupid things and believe whatever we want, deep hypnosis is tied with breaking a dissociative identity disorder alter for the most prominently you will see unconscious expression beyond the point of infant development. When analyzing the nature of the synchronicity in life, anybody who's life beats the shit out of them at every turn, often in very specific ways again and again, the only logical conclusion is past life karma. When analyzing the nature of levels of cognitive functioning it becomes very apparent what we're looking at is soul age. Level one preaches they know how be people while judging those with interesting lives because they know karmatic development is how really be people. There are many cases, and I myself am one of them, of infants speaking of their past lives, it is particularly common in lightworker five and above. Your past life index is right there, most level three cognitive functioning and some level two cognitive functioning have the information from their most recent life transferred over, this is what hypnotists are looking at. We've all seen ours. We speak to God. God's right here in our heads and it's told all of us it's reincarnation.For all eternity we will be reborn with ever evolving karma. Humans will always reincarnate as humans, karma could never possibly translate from human to animal and animal to human, and nobody's going to end up a fern there's nothing you could possibly do to earn fern karma and if you did there's nothing you could possibly do as a fern to make it back into humanity. Male souls reincarnate as male, female souls reincarnate as female and gender fluid souls bounce back and forth between male and female bodies.
There's no tired souls, there's no end point, this is forever.
Reading levels of cognitive functioning you may have gotten the impression we were all at one point a 2-8, we were not, most people skip large chunks of the developmental ladder. Some people get stuck on a single point for up to five lives. Most of us have skipped 2-8, 2-8 is generally only if you're being punished.
Past Life Index: Foreword by Kit Carruthers
With 80% of level three cognitive functioning, about 30% of level two cognitive functioning and 1% of level one cognitive functioning the information relating to your most recent life has been carried over to this life and it's sitting there waiting for you to find it.
This is what hypnotists are looking at when they reveal your past lives, well that or whatever bullshit happens to come out their face. This is what you may catch glimpses of in psychedelic states. How you're going to find it is to crack to the bottom of all of your repressed memories, suddenly it will just display itself to you.
Reincarnation: Stories
Revolutionary Artists' Stories