Hillsong United's song "I Will Sing" is a Christian worship song that expresses the desire to praise and worship God. The song talks about how God has set the singer free and is the one they seek in life. God's love is portrayed as completing their life and being as essential as the air they breathe. The song also acknowledges Jesus as the Savior of the world, the reason for their existence and the one who gives them purpose. The lyrics convey a deep longing to lift their voice and praise the one who saved them. The singer cries out for more of God, expressing their need for Him in their life. They reach out for a deeper connection with God, desiring to experience more of His presence in their heart. The song also emphasizes the importance of waiting on God and seeking His voice in the stillness. The singer acknowledges that in God's presence is where they truly belong. They desire for their heart to be pure and refined, just as gold is refined. The overall message of the song is a declaration of dedication and surrender to God, expressing a willingness to worship and follow Him wholeheartedly.