**OF THE SACRAMENTS.**
In regard to our sacraments, they present Christ the more clearly to us, the more familiarly he has been manifested to man. ever since he was exhibited by the Father, truly as he had been promised. For Baptism testifies that we are washed and purified; the Supper of the Eucharist that we are redeemed. Ablution is figured by water, satisfaction by blood. Both are found in Christ, who, as John says, “came by water and blood;” that is, to purify and redeem. Of this the Spirit of God also is a witness. Nay, there are three witnesses in one, water, Spirit, and blood. In the water and blood we have an evidence of purification and redemption, but the Spirit is the primary witness who gives us a full assurance of this testimony. This sublime mystery was illustriously displayed on the cross of Christ, when water and blood flowed from his sacred side ( John 19:34 ); which, for this reason, Augustine justly termed the fountain of our sacraments (August. Hom. in Joann. 26). Of these we shall shortly treat at greater length. There is no doubt that, it you compare time with time, the grace of the Spirit is now more abundantly displayed. For this forms part of the glory of the kingdom of Christ, as we gather from several passages, and especially from the seventh chapter of John. In this sense are we to understand the words of Paul, that the law was “a shadow of good things to come, but the body is of Christ” ( Col. 2:17 ). His purpose is not to declare the inefficacy of those manifestations of grace in which God was pleased to prove his truth to the patriarchs, just as he proves it to us in the present day in Baptism and the Lord’s Supper, but to contrast the two, and show the great value of what is given to us, that no one may think it strange that by the advent of Christ the ceremonies of the law have been abolished.
Source
source-manifest/institutes— Calvin, Institutes of the Christian Religion, tr. Beveridge 1845 (PD)- evidence_grade: D_doctrinal_textbook