Christ's presence (Light of Christ) is more than just 'felt' throughout the universe. It IS the universe. Its what makes matter coherent and cells alive. I saw this in vision one time while giving a blessing.

3. What is meant by the Holy Spirit as described in the Fifth Lecture on Faith?

[ Lec 5:2q] and all those who keep his commandments shall grow up from grace to grace, and become heirs of the heavenly kingdom, and joint heirs with Jesus Christ;

[ Lec 5:2r] possessing the same mind, being transformed into the same image or likeness, even the express image of him who fills all in all;

[ Lec 5:2s] being filled with the fullness of his glory, and become one in him, even as the Father, Son, and Holy Spirit are one.

Q. How many personages are there in the Godhead?
A. Two: the Father and the Son.

Quote from Denver Snuffer
If the Holy Ghost is a "personage of Spirit" and it can "dwell in us," and the Holy Spirit is "the mind of the Father and Son" then are they the same thing?

I believe they are the same thing. The mind of the Father and the Son can certainly be revealed and Their will carried out by the Holy Ghost. I don't see why we should think of those two terms (H.G. and H.S.) as being different from each other.

The scriptures have explained that the "Holy Ghost" which dwells in you - this personage of Spirit - has the following other descriptions, or attributes:
-the Comforter
-the record of heaven
-the truth of all things
-the peacable things of immortal glory
-that which quickeneth all things
-that which knoweth all things
-that which has all power according to wisdom, mercy, truth, justice and judgment.
(Moses 6: 61.)
This is a description of the personage of Spirit which dwells inside you. This is the Holy Ghost. This is something that can be in contact with the Holy Spirit, or the "mind of the Father and Son."