Christ is coming!

Some questions:

Is religion dynamic? Can it change like Science? Can you compare Religion with Science? Maybe that is the wrong analogy? When does an Ism become a no-ism?

The applicable term is progressive, not dynamic. Truth does not change. It is our individual awareness of Truth that deepens and progresses as we proceed with our spiritual development.

Science requires physical proofs. Since science still does not have the instruments capable of discerning things spiritual, therefore its findings cannot be complete. Since science cannot verify, then traditional science must deny the existence and truth of spiritual realities.

All the religions take up different aspects and levels of the same divine truths, not all. And not everything known and taught there are true. But nevertheless, they all lead to the same God and the One Truth. However, while we still lack the sufficient knowledge and experience to fully comprehend the divine, we are enjoined in the meantime to believe on faith. The knowledge comes after the studies. Learning comes in stages, the simple before the complex, the elementary before the advanced. But in the end, all will be known. And all the aspects and levels will merge and unite as one.

We are likened to mountain climbers positioned at different heights along the path ascending to the top of the mountain. At each position, East, West, ground level or higher, we can only see as far as the surroundings allow. But after we reach the summit, then only can we see all aspects, all sides and learn ultimately that all are connected and related as one.

If it changes with new discovery then what happens to the old souls that followed certain rules that are now obsolete?

We just adapt or upgrade. Nothing is lost. We build on those we already learned.

Can we assume that no Religion has a monopoly and in fact each Religion has its truths and untruths?

Yes. All the different religions take up different aspects and levels of the same divine truths but nevertheless lead to the same God and Truth. The Truth was not entrusted to any one person or group alone but was parceled out to everyone in part according to what we deserve. To know the whole Truth, we must draw from the others the part entrusted to them.

At some point in time, can a person, with his limited knowledge and grasp of the real GOD, be able to arrive at a conclusion as to his relationship with God and the Universe?

We only comprehend the Truth and enter the plane of being at the level in the order of evolution that we have arrived. To go higher, we will need to comply with all the requirements at our target level.

Is GOD singular or the collection of all "Kindred Spirits"?

God may be defined as Infinite Intelligence. Imperfect as we are and still greatly influenced by matter, we are unable to completely understand the true exact nature of God. Finite minds cannot comprehend the infinite. In addition, our vocabulary is so poor that we are unable to more satisfactorily define God. While we may attribute to God certain very desirable and positive characteristics, we should never feel that God is confined to such attributes. To do so would be to limit God, Who is unlimited. However, we will be able to know and comprehend God more fully just as soon as we become totally freed from earthly influences and approach the righteousness that is God according to His ethical teachings.

There is only One Supreme God. While we are all in God, part and parcel of God, our goal remains to be in complete at-one-ment with God. Life is a never-ending quest for perfection in our thoughts, words and deeds.

Do we exists in some kind of a Matrix where souls indulge in artificial existence in the process of cleansing themselves until they are elevated into another Matrix, ad infinitum, until they are pure and ready to join the Supreme Collective ?

I too was struck by the veiled depiction of reality in 'The Matrix' movie series. In any of the material, physical planes, yes, based on the New Teachings. This is why our world is termed 'The World of Illusion' where things are not what they seem as explained in the concept of "Maya" in the Eastern teachings. In contrast, the Spirit Worlds (the next immediate plane is the Astral Plane), higher Mental, Nirvanas and more Spiritual planes are the Real Worlds.

After we complete the human stage of our development in the lower worlds, then we enter into the Real World where we can enjoy the life of happiness, peace and contentment that God has prepared for all His creatures.

As described in the 'Orders of Spirits':

"Pure Spirits have passed through every degree of the scale of progress and have freed themselves from all the impurities of materiality. Having attained the sum of perfection of which created beings are susceptible, they no longer have to undergo either trials or expiations. Being no longer subject to reincarnation in perishable bodies, they enter on the life of eternity in the immediate presence of God. They are in the enjoyment of a beatitude which is unalterable, because they are no longer subject to the wants and vicissitudes of material life; but this beatitude is not the monotonous idleness of perpetual contemplation."

What was / is the purpose of the exercise?

Perfection through our own exertions.

If the Spirits were already "one" at the onset, why were they dispersed only to suffer the rigors of material existence and then eventually reunite?

In the beginning, we were created perfect seeds that God intended are to develop to perfection through our own exertions. While we were endowed with eternal life, everything else in life that we can be entitled to enjoy must be based on personal merit. In the Spirit Reality, there are no free gifts. Everything must be earned.

I may be one of those lost Souls (Spirit, Being, Entity : are these all the same or each has its own category?).

Spirit is our true nature. We are spirits, not men. Humanity is simply a stage in the order of evolution that we spirits must hurdle. No one is a lost soul. We here on Earth are all developing spirits at different levels of evolvement. But the term is usually applied to discarnate and wandering spirits (dead and out of the body) who are still unable to ascend to the Spirit World momentarily because they need to complete some unfinished lessons and serve some spiritual purpose in the process.

An entity pertains to a particular spirit being.

I must admit I stopped searching but when I encounter some new stuff, my curiosity gets the best of me and then I start trying to understand.