How do we know that worship must be in spirit and truth?

The necessity for worshiping in spirit and truth is firmly rooted in Scripture. John 4:24 emphasizes that God requires this form of worship, indicating that external actions or rituals are insufficient if not motivated by a heart transformed by the Holy Spirit. True worship flows from a genuine relationship with God, acknowledging His nature and holiness. Therefore, to worship Him, one must be spiritually alive, made so by grace, and adhere to the doctrines He has revealed. This understanding serves as a powerful reminder that all forms of worship must be aligned with biblical truth to be genuinely accepted, thus eliminating any form of idolatry or false worship.