Let us now see what is meant by the due worship of God. Its chief foundation is to acknowledge Him to be, as He is, the only source of all virtue, justice, holiness, wisdom, truth, power, goodness, mercy, life, and salvation; in accordance with this, to ascribe and render to Him the glory of all that is good, to seek all things in Him alone, and in every want have recourse to Him alone. Hence arises prayer, hence praise and thanksgiving—these being attestations to the glory which we attribute to Him. This is that genuine sanctification of His name which He requires of us above all things. To this is united adoration, by which we manifest for Him the reverence due to his greatness and excellency, and to this ceremonies are subservient, as helps or instruments, in order that, in the performance of divine worship, the body may be exercised at the same time with the soul. Next after these comes self-abasement, when, renouncing the world and the flesh, we are transformed in the renewing of our mind, and living no longer to ourselves, submit to be ruled and actuated by Him. By this self-abasement we are trained to obedience and devotedness to his will, so that his fear reigns in our hearts, and regulates all the actions of our lives. That in these things consists the true and sincere worship which alone God approves, and in which alone He delights, is both taught by the Holy Spirit throughout the Scriptures, and is also, antecedent to discussion, the obvious dictate of piety. Nor from the beginning was there any other method of worshipping God, the only difference being, that this spiritual truth, which with us is naked and simple, was under the former dispensation wrapt up in figures. And this is the meaning of our Saviour’s words, “The hour cometh, and now is, when the true worshippers shall worship the Father in spirit and in truth,” (John 4:23.) For by these words he meant not to declare that God was not worshipped by the fathers in this spiritual manner, but only to point out a distinction in the external form, viz., That while they had the Spirit shadowed forth by many figures, we have it in simplicity. But it has always been an acknowledged point, that God, who is a Spirit, must be worshipped in spirit and in truth.
 John Calvin, Theodore Beza, and Henry Beveridge, Tracts Relating to the Reformation, vol. 1 (Edinburgh: Calvin Translation Society, 1844), 127–128.