**OF THE SACRAMENTS.**
From the definition which we have given, we perceive that there never is a sacrament without an antecedent promise, the sacrament being added as a kind of appendix, with the view of confirming and sealing the promise, and giving a better attestation, or rather, in a manner, confirming it. In this way God provides first for our ignorance and sluggishness, and, secondly, for our infirmity; and yet, properly speaking, it does not so much confirm his word as establish us in the faith of it. 122 D122 That is, the sacrament cannot make the promise of God objectively more certain, but it can make our faith in God’s promise subjectively more certain. God’s Word is always absolute, strong, unchangeable, and “settled in heaven”; but our faith, throughout this life is always relative, weak, changeable, and frequently in need of confirmation and assurance. Thus we properly distinguish between the objective certainty of God’s Word, and the subjective certainty of our faith.
Source
source-manifest/institutes— Calvin, Institutes of the Christian Religion, tr. Beveridge 1845 (PD)- evidence_grade: D_doctrinal_textbook