The Promise of the Holy Spirit

John Owen writes about the ministry of the Holy Spirit within us.

And if we consider this promise of the Spirit as to the ends of it, we shall find that he is promised and given as the sole cause and author of all the good that we can enjoy in this world. For there is no good communicated to us, no gift, grace, mercy, privilege, or consolation bestowed upon us, but through the Holy ghost; nor is there any good in us towards God, any faith, love, duty, or obedience, but what is effectually wrought in us by him, and by him alone. (The Holy Spirit: His Gifts and Power by John Owen, pp. 112-113)

According to Ephesians 1, the Holy Spirit is the gift of God that opens the eyes of our hearts so that we understand the riches that God has bestowed upon us through salvation.