In the final instalment of our short series, we come to the Holy Spirit. The most common way of listing the triune persons is in this order, but they are listed in alternative ways in scripture. The Spirit is the only person whose personhood has been questioned. Yet the word of God clearly presents him as a person as much as the Father and Son. In this week's message, we consider his eternal nature, his life-giving and life-upholding power, and the various ways in which he has worked in the hearts of the saints.