And I will ask the Father and He will give another comforter to you, in order that He may abide with you into the age, the Spirit of Truth, Whom the world does not have the inherent ability to receive because it cannot observe Him nor experientially know Him. But you experientially know Him because He abides alongside you and will be in you (John 14:16–17).
In the upper room, on the night in which He was betrayed, Christ gave a promise to the disciples to send another who would abide with them into the age. We are now in the age to which Jesus was referring, and the Spirit has been sent. Everyone who is a part of the Church has the Holy Spirit abiding in them, because from the moment we believe that Christ died on behalf of our sins, was buried, and rose again on the third day according to the Scriptures, He indwells us.
The indwelling of the Holy Spirit is not an emotional experience; it is a rational one. It occurs within our spirit, for our spirit is now joined to God (1 Corinthians 6:17). From the day of Pentecost in Acts 2 until today, all who are part of the Church have the Holy Spirit within them. He is the One who teaches us how to abide in Christ (1 John 2:24). He is a promise given only to those in the Church; no other saints were, or will be, in this type of relationship with the Holy Spirit. In the Old Testament, the Spirit would come upon men, but He would not abide with them. Because He abides in us, He produces desires within our very being that long for and seek righteousness (Galatians 5:17)—not through emotional means, but through rational, logical understanding of the truth.