"Must..."! That is a hard word when spoken by Jesus! So we should pay careful attention when the Lord uses it. Our actions must conform to his words. "Must..."! Yet this "must" is not one we can do on our own. The requirement to worship God acceptably cannot take place because of our effort — not because we do it right, say the right words, do it in the right place, or follow the right procedures. God is Spirit. We cannot worship God without the Holy Spirit! In other places, we are told that true worship is worship in the Spirit (Philippians 3:3; Ephesians 5:17-21 — notice "pray/praying in the Spirit" in Ephesians 6:18 and Jude 20). More than engaging our minds and our bodies, we need the presence of the Holy Spirit to help us worship acceptably. We need the Spirit for at least two reasons. The first is that the Holy Spirit facilitates our communication with God by giving us access to the Father (Ephesians 2:18), interceding for us (Romans 8:26-27), and enabling us to cry Abba Father to God, spirit with Spirit to God (Romans 8:14-17; Galatians 4:6). The second reason is that the Spirit is at work conforming us to be like Jesus (2 Corinthians 3:18), empowering us to put to death the misdeeds of the body (Romans 8:9-13) and to display the fruit of the Spirit (Galatians 5:22-23). This influence of the Spirit is why being born of water and the Spirit is so important (John 3:3-7; Titus 3:3-7). Without the Spirit, true worship will not happen. We MUST have the Spirit to worship in spirit and truth!