Is the soul constant in the process of reincarnation?

Truth, as a Buddha, is unchangeable, and there is no birth or death. If you say that the original soul refers to this, you can say that you will not change, and of course you will not be reborn. But we often say that the soul of reincarnation, which Buddhism calls "Aryan knowledge", changes every minute.

All our thoughts and actions at all times, whether good or evil, are like seeds, planted in the body of this reincarnation. The reincarnation of Ariel's knowledge can be said to be the sum of the seeds of good and evil, and then these good and evil will affect the direction of Ariel's reincarnation.

If you are good, you will rise and enter good places such as humanity and heaven.

If you are evil, you will fall and be reborn in places like beasts and hungry ghosts.