Bible Dictionary
WILL-WORSHIP
Will-worship is religious devotion originating in human choice rather than God’s command. It may appear wise or rigorous, but Scripture regards it as self-imposed worship lacking true power against sin.
Biblical Usage
In Colossians 2:23, will-worship is presented as a show of wisdom. The term describes self-chosen religious devotion and is associated with practices that have an appearance of wisdom but lack true effectiveness.