But the Helper, the Holy Spirit, whom the Father will send in My name, He will teach you all things, and bring to your remembrance all things that I said to you.
~ John 14:26 (NKJV)
The role or purpose of the indwelling of the Holy Spirit in the life of the Christian is to teach us all things related to the one true Faith and to continually point us back, to bring into our hearts and minds, the person, work and words of the Lord Jesus Christ. The Holy Spirit is called the Spirit of Truth for it is His design to illuminate the life of the believer in the glorious truth of God and the Lord Jesus. It is the abiding presence of the Holy Spirit that empowers us to know, love and serve the Lord. He draws us, leads us and moves us continually to Christ.