The Christian religion has as its core the cross. In other words, it appeals to two forms of extreme cruelty: one is the death provoked by torture and the other the process of dying.
Both of them suppose that the mind or the spirit of a man is drive away from the bodily life. The torture is meant to provoke atrocious pain and thus to leave a narrow place for the activity of the human mind. The process of dying also put the mind in a situation in which it cannot function. A dying man cannot really think of anything.
In such conditions, the mind acts only as a pulsation of consciousness.
It seems unexplainable how could the Christianity could evolve as a spiritual religion starting from the experience of crucifixion. Perhaps we should admit that it did not evolve from it, but rather from the pretty shallow humanitarian spirituality of its time. We see that in our time, too. A Christian preach about love can be replaced by an atheist discourse on the same topic with not so many changes.
The value of the mind acting as a pulsation was explored by many non-Christians. In religion, it is used by the spiritual practices of the Orient which focus on the control of respiration. In non-religious spiritual life, it is present at musicians, painters, writers, but also at those who are not satisfied with a common life. For all of them, the desire to live in another way than according to social habits is preserved by a determination of mind which is felt as their respiration. Without any explanation, their mind has a pulsation orientated to reach their goal of life.
The Christianity correctly saw that such pulsation is most clearly experienced by a mind put in the face of death. It also had a right intuition that it is closer to a superhuman realm than to that of the common social life. However, not all the Christians understood that spirituality of pulsation. They preferred like all of us a shallow and comfortable spirituality.