"But the Comforter, which is the Holy Ghost, whom the Father will send in my name, He shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you" (John 14:26).
At the moment we receive Jesus Christ as Lord and Savior through faith, we are sealed "with that holy Spirit of promise" (Ephesians 1:13), as God the Father sends the Holy Spirit to dwell in our hearts. The Holy Spirit then testifies of Christ (John 15:26), so that we are energized with boldness and power to proclaim Jesus to a lost world. In fact, "no man can say that Jesus is the Lord, but by the Holy Ghost" (I Corinthians 12:3). The Holy Spirit is sent to us in Christ's name (John 14:26), glorifying Christ (16:14), and teaching us all things (14:26). The Holy Spirit guides us into all truth, as He brings Christ's words into remembrance (v.26) and reveals the things of God (I Corinthians 2:11).
As believers we must realize that our bodies are not our own, but rather temples of the Holy Spirit (I Corinthians 6:19). We are thus exhorted to "be filled with the Spirit" (Ephesians 5:18), which essentially means that our mind, will, and emotions are to be controlled by the Holy Spirit. The Greek word for filled is pleroo, which means, "filled to the full," denoting that we are to make no room for the flesh. Instead, we are to "Walk in the Spirit and . . . not fulfil the lust of the flesh" (Galatians 5:16).
Perhaps the greatest blessing of having the Holy Spirit indwelling us is having God's love poured out into our hearts (Romans 5:5). It is only by His Spirit that we can possibly "comprehend with all saints what is the breadth, and length, and depth, and height; And to know the love of Christ, which passeth knowledge, that ye might be filled with all the fulness of God" (Ephesians 3:18-19). MDR