The Holy Ghost - The Mind of God

The Spirit within you is Holy.  The Holy Ghost Dwells in you.

"The Father has a body of flesh and bones as tangible as man’s; the Son also; but the Holy Ghost has not a body of flesh and bones, but is a personage of Spirit. Were it not so, the Holy Ghost could not DWELL IN US. D&C 130:22"

This is the best description of what Abides In You.

"Therefore it is given to abide in you; 

the record of heaven; 

the Comforter; 

the peaceable things of immortal glory;

the truth of all things;

that which quickeneth all things, 

which maketh alive all things;

that which knoweth all things, 

and hath all power according to wisdom, mercy, truth, justice, and judgment. 

Moses 6:61"

The Holy Spirit Constitutes the Godhead with the Father and the Son. 

Q. Do the Father, Son and Holy Spirit constitute the Godhead?
A. They do. (5:12.)
Lectures on Faith

The Holy Spirit is the mind of God

Q. Do the Father and the Son possess the same mind?

A. They do. John 5: 30. I (Christ) can of my own self do nothing: as I hear, I judge, and my judgment is just; because I seek not my own will, but the will of the Father who sent me. John 6:38. For I (Christ) came down from heaven, not to do my own will, but the will of him that sent me. John 10: 30. I (Christ) and my Father are one.

Q. What is this mind?
A. The Holy Spirit. John 15:26. But when the Comforter is come, whom I will send unto you from the Father, even the Spirit of truth, which proceeds from the Father, he shall testify of me. (Christ.) Gal. 4: 6. And because you are sons, God has sent forth the Spirit of his Son into your hearts.

And he being the only begotten of the Father, full of grace and truth, and having overcome, received a fulness of the glory of the Father-possessing the same mind with the Father, which mind is the Holy Spirit, that bears record of the Father and the Son, and these three are one, or in other words, these three constitute the great, matchless, governing and supreme power over all things: by whom all things were created and made, that were created and made: and these three constitute the Godhead, and are one: The Father and the Son possessingthe same mind, the same wisdom, 

glory, power and fulness: Filling all in all--the Son being filled with the fulness of the Mind, glory and power, or, in other words, the Spirit, glory and power of the Father--possessing all knowledge and glory, and the same kingdom: sitting at the right hand of power, in the express image and likeness of the Father--a Mediator for man--being filled with the fulness of the Mind of the Father, or, in other words,the Spirit of the Father: which Spirit is shed forth upon all who believe on his name and keep his commandments: 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;possessing the same mind, being transformed into the same image or likeness, even the express image of him who fills all in all: being filled with the fulness of his glory, and become one in him, even as the Father, Son and Holy Spirit are one.

It's within us to be One with the Father and the Son.

"Verily, verily, I say unto you, that this is my doctrine, and I bear record of it from the Father; and whoso believeth in me believeth in the Father also; and unto him will the Father bear record of me, for hewill visit him with fire and with the Holy Ghost. And thus will the Father bear record of me, and the Holy Ghost will bear record unto him of the Father and me; for the Father, and I, and the Holy Ghost are one." 3rd Nephi 11: 35-36