[radikal]

contd....

Well to answer your first few questions according to what I have read and felt, ( about population, multiplication of souls), thamiz, several arguments can be made depending upon the basic views about the soul.

Assuming the soul according to Dvaita principles..

First, you think earth is the only planet where life exists? And humans are the only beings with a soul ?

Yes individual souls do multiply. Ever heard of soul-mates? or God taking incarnations, what do you think those are..? I would certainly think the incarnations are like dividing the soul of a God, which merge back with the God on the end of the incarnation.
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If we consider the basis of a soul according to Advaita (Not-two, Non-duality) there is only one Soul. The Soul is All That Is, and there is nothing else.

As an analogy, we may think of air. Theres air everywhere over and near the earth's surface, Air is all that is. However, once you have a building, you can define Air inside the building.

But it still is the same Air, only that a part of it occupies the building, another part of it surrounds it. The difference is merely a matter of perception.

You can go on creating smaller rooms in that building, and air will 'divide' itself to occupy those rooms.

So, Air is all that is, yet I can somehow uniquely feel that the air inside my kitchen is somewhat hotter than the air in my living room, thus differentiating it by its assumed characteristics.

So this is what happens with the Soul too. The Soul is All That Is, and there is nothing else. But it can collect itself in clumps of varying frequencies forming dead matter, plants, animals, humans and other beings in the spiritual hierarchy.

The higher the frequency of vibration, the higher is the energy, the higher is the spiritual self awareness of the form that the One Soul assumes.
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Answering your final question about the souls living a first lifetime, -- yes souls sometimes are in their first lifetimes, but no they aren't in their first lifetime exactly.

The Hindu concept of time is cyclic, so time is not a straight line. Creation and the Creator both are eternal (transcending time), while Creation seems everlasting ( for a loooooong period of time).

And hence no one is exactly leading the first lifetime or last lifetime. It is an eternal cycle that appears everlasting.

Love and Light.