The Existence and Being of God transcend the finite grasp. How then can we expect to be able to understand the process by which we become His children? Our Lord, Himself, declared that the new birth was a thing of mystery: "the wind bloweth where it listeth, and thou hearest the sound thereof, but canst not tell whence it cometh, and whither it goeth; so is every one that is born of the Spirit" (John 3:8). The wind is something about which the most learned scientists know next to nothing. Its nature, the laws which govern it, its causation, all lie beyond the purview of human inquiry.
~ Arthur W. Pink