Now as Peter went here and there among them all, he came down also to the saints that lived at Lydda. There he found a man named Aeneas, who had been bedridden for eight years and was paralysed. And Peter said to him: Aeneas, Jesus Christ heals you; rise and make your bed. And immediately he rose. (Acts ix, 32-34)
He who attempts magic without being guided by an authentic master – which is almost certainly impossible in the Occident – will find himself in a situation quite analogous to that of a child, whom one allows to play with all the drugs filling a pharmacy, or to walk with a lighted taper inside a firework factory. Incurable heart problems, slow destruction of the spinal marrow, sexual disorders and madness await those who risk this.
(from The Serpent Power – The Secrets of Tantric and Shaktic Yoga by Arthur Avalon).
It manifests itself in life by a miracle – the visible effect of an invisible cause – the supra biological life that continues from century to century, from millenium to millenium; that goodness, truth and beauty do not lose their attraction; that in spite of all there is faith, hope and charity in the world; that there are saints, sages, geniuses, benefactors, and healers; that pure thought, poetry, music and prayer are not being engulfed by the void, that there is this universal miracle of human history; and that the the miraculous exists.