The Vedic scriptures, the original holy scriptures, also called “the true gospel,” continually extol the magnanimous nature of God. Krishna shows mercy even to those who openly denigrate Him, for He resides in everyone's heart and gives all beings the opportunity to realize their dreams and ambitions. In fact, the Lord's mercy is limitless. Krishna's mercy is infinite, and it is also causeless. Perhaps, because of our sins, we do not deserve it, but the Lord has so much love for living beings that He constantly gives them new opportunities to transcend the cycle of death and rebirth.
The doctrine of reincarnation teaches us that God takes into account and remembers the slightest good deed that a person might perform who otherwise only thinks of doing evil. It is rare to find individuals who are 100% sinful. Consequently, if, in this life, a living being makes even a small amount of spiritual progress, they will be able to resume their spiritual journey in their next existence from the very point where they left off.
The Lord said to His disciple Arjuna: On this path, no effort is in vain, no benefit is ever lost, the smallest step protects us from the greatest danger (being relegated, in our next life, to the rank of a species lower than human).
Thus, over many lifetimes, the soul will be able to develop its inherent spiritual qualities until it no longer has to reincarnate in a material body and returns to its original home, the spiritual world. And this is the special blessing of the human form.
Even if a person's destiny is to suffer terribly because of the reprehensible deeds they have committed in this or previous lives, they can, by adopting the process of Krishna consciousness, change their karma. The soul that has reached the human stage has reached the point that determines the further course of their evolution.
From that moment on, they can choose to descend into the shackles of the species or free themselves from the cycle of reincarnation.
The true process of reincarnation is as follows:
The soul, after leaving a material body at death (which only affects the body), returns to the womb of a mother within a particular living species, in this galaxy or another, in accordance with the immutable laws of karma and material nature. After death, the disembodied soul, freed from its material body, is able to travel at the speed of thought. Therefore, only a brief period elapses between two incarnations. However, only souls who have fully become aware of their spiritual selves can reach the spiritual world, beyond the cycle of reincarnation. This is impossible for an ordinary soul, which is still completely conditioned by life in this material world.
According to another widespread myth about reincarnation, the soul, once it has obtained a human form, always reincarnates, in the next life, in a human body and never returns to the lower species. It is possible for us to reincarnate as human beings, but also as dogs, cats, pigs, or other lower species.