The Veil is a western Christian metaphor used to describe Disconnection from Consciousness. When the Crown Chakra is damaged/distorted and the Bodily Ego is disconnected from Spiritual Ego, we may say that a veil has been placed over the individual. The veil prevents connection to one's own Resident Monadic Consciousness
In Christianity the concept of The Veil appears in the gospels (Matthew 27:51; Mark 15:38; Luke 23:45) where it is written that the curtain/Veil of the Temple was torn asunder.
In Christian/Judaic context the concept is used to represent the separation (i.e. dis-Connection) between the Holy of Holies (i.e. The Fabric of Consciousness) and Creation. Note that in Christian/Judaic context access to Consciousness as it exists behind The Veil was given only to a High Priest, and only on Yom Kippur (a.k.a.Day of Atonement).
Sharp, Michael (2006). Parable of the Blindfold. http://www.michaelsharp.org/parable-of-the-blindfold/