Edgar Cayce.

‘The human spirit is omniscient and all-powerful and participates in all that happens in the universe, but as men’s organs are not yet sufficiently developed to transmit the experiences of the spirit to their consciousness, they themselves neither know nor feel any of this.

It is the physical body that has to be strengthened, not the spirit
You will ask, “What should we do, then? Should we try to strengthen, enlighten and educate our spirit?” No, it is the physical body that has to be strengthened, purified, spiritualized and rendered divine.

We must take care to give our physical body only pure food and drink, pure air, the pure rays of the sun and all that is purest and best in the way of forms, colours, sounds, music and perfume.

The spirit is indestructible, a spark from God
The spirit does not need any of those things; like God, the spirit is everywhere; it is omniscient and omnipresent. It is our matter that has to be cared for and transformed, and in doing this, we shall be giving our spirit a better chance of manifesting itself in all its splendour.’

Spiritualists often think that it is the spirit that must be purified and ennobled and that they may neglect and even despise the physical body. They think that if the spirit manifests itself imperfectly on the physical level it is because it is imperfect and needs to be developed, strengthened and purified.

No, the spirit is made of subtle, luminous, indestructible material; it is eternal, a spark from God; it does not need to be instructed or improved.

The spirit is imprisoned by the constraints of our physical body
This is very clear in the phenomenon of clairvoyance, for instance. Take the example of the American clairvoyant Edgar Cayce. He was an ordinary man with very little formal education and yet, when he was in a hypnotic trance, he showed that he had immense knowledge in all kinds of subjects such as medicine and history.

Once he came out of his trance, however, he could remember nothing about what he had seen, and this shows that when the spirit of even the most ordinary human being is given the opportunity to escape from the constraints of the physical body in which it is imprisoned, it becomes omniscient.’

Omraam Mikhaël Aïvanhov,
The Bonfin, July 19, 1975

Complete Works Volume 17. Jnana Yoga Volume 1 – Know Thyself
Chapter 3, Spirit and Matter