How do we know that worship in spirit is important?

Worshiping in spirit holds great importance as it signifies the involvement of the Holy Spirit in the act of worship. It is through this spiritual engagement that believers can properly relate to God, bringing their heartfelt adoration and reverence before Him. This aspect of worship emphasizes that sincere devotion can't arise from mere external compliance to laws or rituals but must originate from a heart transformed by grace. The Apostle Paul illustrates this in Philippians 3:3, where he states that true worshipers rejoice in Christ Jesus and have no confidence in the flesh, further confirming the necessity of heartfelt worship.