when it is time we will come back and hopefully be better.
with god all things are possible.
This is why it is wrong to eat the cow. The cow is holy. It gives the soul a place to rest.
Then the soul comes back. If it was good before it will come back better and higher caste. If it was bad, it will be darker. If it was terrible, it could even become African in the next embodiment.
These facts are not popular, but they are still facts.