Pentecost was when Jews would bring the firstfruits of their wheat harvest. It was a day on which they acknowledged and remembered that it is God who provides them with a harvest and a land to live in. The coming of the Spirit connects with this truth. He is given to the church on this day as a firstfruit (Romans 8:23) with the promise that there is a full harvest to come. Now that he dwells amongst God’s people (Romans 8:9–11), life in the Spirit has begun and later there will be a full harvest when we are given a new spiritual resurrection body fit for eternal life in a new world (1 Corinthians 15:1–58). There we will live in God’s presence, man with God (Revelation 21:1–4) even as Christ our head is now at the Father’s right hand (Hebrews 1:3). To use the words of Paul from Ephesians (Ephesians 1:14), he, that is the Spirit, is the guarantee of our inheritance until we acquire possession of it. He is the firstfruit of the glorious new future that awaits God’s people. The Spirit was thus given to the church at Pentecost in order to confirm to us that there is a full harvest still to come when Christ returns in glory.