John 4:24

God is a spirit; and they who worship must worship in spirit and in truth.

2 Corinthians 3:17

Now the Lord is the Spirit; and where the Spirit of the Lord is, there is liberty.

Matthew 15:8-9

"This people honoreth me with their lips, but their heart is far from me.

Philippians 3:3

For we are the circumcision, who worship by the Spirit of God, and glory in Christ Jesus, and have no confidence in the flesh;

2 Corinthians 1:12

For our glorying is this, the testimony of our conscience, that in simplicity and the sincerity which is of God, not in fleshly wisdom, but in the grace of God, we have conducted ourselves in the world, and especially toward you.

1 Timothy 1:17

Now to the King eternal, the imperishable, invisible, only God, be honor and glory for ever and ever. Amen.

Treasury of Scripture Knowledge

Summary

God is a Spirit: and they that worship him must worship him in spirit and in truth.

Bible References

A spirit

2 Corinthians 3:17
Now the Lord is the Spirit; and where the Spirit of the Lord is, there is liberty.
1 Timothy 1:17
Now to the King eternal, the imperishable, invisible, only God, be honor and glory for ever and ever. Amen.

Must

Matthew 15:8
"This people honoreth me with their lips, but their heart is far from me.
2 Corinthians 1:12
For our glorying is this, the testimony of our conscience, that in simplicity and the sincerity which is of God, not in fleshly wisdom, but in the grace of God, we have conducted ourselves in the world, and especially toward you.