Question
What does the Bible say about worship? (what worship is, and how God is to be worshiped)
Analysis
Worship in spirit and truth
When a woman asked Jesus where to worship, He redirected the question from place to manner and heart: true worshipers worship the Father 'in spirit and truth' (John 4:23; John 4:24). Worship is not confined to a building, a ritual, or a style; it is the response of a heart that knows God truly ('truth') and engages Him genuinely ('spirit'). That is why the Bible can call ordinary, obedient life, bodies presented to God, 'your spiritual worship' (Romans 12:1): all of life, offered to God, is worship.
What true worship looks like, and what counterfeits it
Scripture is full of worship as praise, thanksgiving, and awe: 'Come, let us sing for joy to the LORD' (BSB, Psalms 95:1; Psalms 95:6), 'enter his gates with thanksgiving' (Psalms 100:4), singing 'psalms and hymns and spiritual songs' with the heart (Ephesians 5:19; Colossians 3:16), and ascribing to God 'the glory due his name' (Psalms 29:2). Heaven's worship centers on God's worthiness: 'Worthy are you, our Lord and God' (Revelation 4:11; Revelation 5:12). But the Bible is equally clear about counterfeit worship. God rejects worship that is lip-service while the heart is far away (Isaiah 29:13), and He refuses worship divorced from justice, 'I hate, I despise your feasts… but let justice roll on like a river' (BSB, Amos 5:21; Amos 5:24). And the very first commandment guards worship from idolatry: no other gods (Exodus 20:3).