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Battles between Christ Jesus and Satan even in the Spirit World
According to the Bible (Act 1), Christ Jesus declared that power would come upon His followers after they receive the Holy Ghost:
8 But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth.
As a result, Christianity has survived 2,000 years after the crucifixion of Christ Jesus. It must not be possible without power from Heaven.
One example is the case of Ignatius of Loyola (1491 – 1556), a Spanish Basque Catholic priest and theologian, who together with Peter Faber and Francis Xavier founded the religious order called the Society of Jesus (Jesuits) and became its first Superior General at Paris in 1541 (https://en.wikipedia.org/wiki/Ignatius_of_Loyola).
Ignatius wrote that he had experienced near-death-experiences more than three times and he had grown spiritually each time. This spiritual growth after a near-death-experience has been told by many who had this experience even today.
But, Ignatius got power to understand almost everything when he was walking along a river in deep religious thought about spiritual matters, faith, and academic matters and sat on the bank below which water flowed. He felt that his intellectual power was illuminated. Then, he prayed to the God at a cross standing nearby. And, he saw a certain spiritual beautiful body before him that he had seen before many times. But, now he could clearly see that this beautiful body came from Satan. So, he drove it out by wielding a stick.
This episode tells that you need power to clearly see Satan and fight against it. And, for this purpose, Christ Jesus should send spiritual power from Heaven. This power is not given through near-death-experiences that might enhance some spiritual power of those who had such an experience. It is thought that St. Paul also got it while he was traveling to Damascus. You cannot tell when Christ Jesus sent such power to those He selected.
The most important thing is that the fight against Satan is the central issue for everybody. Put extremely, Christ Jesus came to this world to fight against Satan. Indeed, every evil in this world comes from Satan. To save the mankind means to fight against Satan and defeat it. As Christ Jesus defeated Satan, He can save the mankind. And, Christ Jesus has given power to defeat Satan to his followers in these 2000 years, one example of which is the case of Ignatius of Loyola.
Near-death-experiences give some healing power and other various spiritual power to those who have survived such experiences, but the power to defeat Satan should be given by Christ Jesus without such experiences. Indeed, Satan uses evil spirits to give some spiritual power to those who have sold their souls to Satan. But, Christ Jesus gives power to defeat Satan to faithful men. The battles between Christ Jesus and Satan must continue even in the spirit world.
John 9, King James Version
9 And as Jesus passed by, he saw a man which was blind from his birth.
2 And his disciples asked him, saying, Master, who did sin, this man, or his parents, that he was born blind?
3 Jesus answered, Neither hath this man sinned, nor his parents: but that the works of God should be made manifest in him.
4 I must work the works of him that sent me, while it is day: the night cometh, when no man can work.
5 As long as I am in the world, I am the light of the world.