So, what does penetrating the veil truly entail?

[zenmaster]

If, having no veil, we have full access to the unconscious (I'm assuming the full unconscious of the Total Self, the Self that has achieved 1D thru 6D) then this access would be never changing. No?

No. The veil limits access to what has been created up to the point of the veiling.

So, you are saying that not only does the veil draw a line between conscious and unconscious in this incarnation, but it draws a line in my eternal existence- preventing me from access to my Higher Self even in time/space?

The veil limits access to the conscious aspects of prior incarnations and limits conscious access to deeper mind in general. The portion of deeper mind is one way we access the higher self in a conscious manner.