Seventy Thousand Veils separate Allah, the One Reality, from the world of matter and of sense. And every soul passes before his birth through these seventy thousand. The inner half of these are veils of light: the outer half, veils of darkness. For every one of the veils of light passed through, in this journey towards birth, the soul puts off a divine quality: and for every one of the dark veils, it puts on an earthly quality. Thus the child is born weeping, for the soul knows its separation from Allah, the One Reality. And when the child cries in its sleep, it is because the soul remembers something of what it has lost. Otherwise, the passage through the veils has brought with it forgetfulness (nisyan): and for this reason man is called insan. He is now, as it were, in prison in his body, separated by these thick curtains from Allah.
But the whole purpose of Sufism, the Way of the dervish, is to give him an escape from this prison, an apocalypse of the Seventy Thousand Veils, a recovery of the original unity with The One, while still in this body. The body is not to be put off; it is to be refined and made spiritual – a help and not a hindrance to the spirit. It is like a metal that is to be refined by fire and transmuted.
– Rifai Sufi Teaching. Quote taken from: moorishscienceacademy.org