Dove Eyes – this expresses Spiritual Insight, the ability to See Spiritual Things.
The eyes of a dove are single, and the Holy Spirit is like a dove; therefore, it also speaks of a Spiritual Mind.
A Single Eye Gives Spiritual Insight.
However, there can be a great danger in having Spiritual Insight if the latter lacks a veil.
A veil serves the purpose of covering.
Though you have Spiritual Eyes to See Spiritual Things, you do not let people know what you have.