The Holy Ghost truly is a gift from God! 

By the gift of God's Spirit in us, we can sit in heavenly places. 

"And hath raised us up together, and made us sit together in heavenly places in Christ Jesus:" - Ephesians 2:6 KJV 

And this is just the earnest of our inheritance! 

"Which is the earnest of our inheritance until the redemption of the purchased possession, unto the praise of his glory." - Ephesians 1:14 KJV 

God promises He will give us this precious treasure of His Holy Ghost in our humble, human, “earthen vessel.” It is beyond comprehension to think that God Almighty would live within us!  

"Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost. For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call." - Acts 2:38-39 KJV 

"But we have this treasure in earthen vessels, that the excellency of the power may be of God, and not of us." - 2 Corinthians 4:7 KJV 

"But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth." - Acts 1:8 KJV