Music and liturgy can assist or express a worshiping heart, but they cannot make a non-worshiping heart into a worshiping one. The danger is that they can give a nonworshiping
heart the sense of having worshiped.
So the crucial factor in worship in the church is not the form of worship, but the state of the hearts of the saints. If our corporate worship isn’t the expression of our individual
worshiping lives, it is unacceptable.
—John MacArthur, The Ultimate Priority, 104