YOGA AND THE CHRISTIAN MYSTICS by Swami Paramananda

 The origin of mysticism is to be found in the human heart, for it is the natural tendency of every living creature to try to unravel whatever is hidden from him. Being impelled by this tendency, some, braver than others, have been able to penetrate the depths of the Unseen, and such people are called Mystics. They use a language with which the world is not acquainted, they perceive truths which to them are more real than what we see in the external universe, but because these do not coincide with the experiences of everyday life, the common mind cannot comprehend their visions or understand their words, and therefore it looks upon them as mysterious.