Is it a sin to not have feelings of affection toward God when lifting your voice in worship to Him? If an unbeliever witnessed your worship, would it testify to them of your love for God? Read below for John Piper’s quote on the engagement of the heart in worship.
The engagement of the heart in worship is the coming alive of the feelings and emotions and affections of the heart. Where feelings for God are dead, worship is dead. (John Piper, Desiring God, 68)