If the heart be not in it

The Great God values not the service of men, if the heart be not in it: The Lord sees and judges the heart; he has no regard to outward forms of worship, if there be no inward adoration, if no devout affection be employed therein. It is therefore a matter of infinite importance, to have the whole heart engaged steadfastly to God.

—Isaac Watts (17 July 1674 – 25 November 1748, English Congregational minister, hymn writer, theologian, and logician).