The Holy Spirit is the first fruits

“And not only that: we too, who have the first fruits of the Spirit, even we are groaning within ourselves, waiting with eagerness for our bodies to be set free. In hope, we already have salvation; in hope, not visibly present, or we should not be hoping – nobody goes on hoping for something which he can already see. But having this hope for what we cannot yet see, we are able to wait for it with preserving confidence.” (8: 23 -25) (NJB)
The gift of the Holy Spirit is the first fruits of the blessings to come. When we possess this incredible gift of the Holy Spirit, we know for certain that God will fulfill all His promises to us. We can wait with persevering confidence for heaven to be our permanent residence.