At the higher levels, the ego is seen to be an illusion, without any innate reality. The understanding of the ego is therefore useful knowledge that is to be discarded later. To attempt to do so, however, before one can dissolve it through spiritual comprehension would lead to a fictitious stance because the mind readily incorporates all learned material and subtly tries to thrive in a new disguised form…
To offset the vanity of what has been learned, one focuses instead with humility on what is yet to be learned.
The ego is clever. It substitutes spiritual pride for personal pride. It goes right on, undaunted. It takes personal credit for spiritual comprehension instead of realizing that the capacity for understanding itself is a spiritual gift from God.
I: Reality and Subjectivity, Ch. 19, pg. 329-330, Veritas Publishing 2003

