Institutes 4.15.3 — OF BAPTISM.
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**OF BAPTISM.**
Nor is it to be supposed that baptism is bestowed only with reference to the past, so that, in regard to new lapses into which we fall after baptism, we must seek new remedies of expiation in other so-called sacraments, just as if the power of baptism had become obsolete. To this error, in ancient times, it was owing that some refused to be initiated by baptism until their life was in extreme danger, and they were drawing their last breath, that they might thus obtain pardon for all the past. Against this preposterous precaution ancient bishops frequently inveigh in their writings. We ought to consider that at whatever time we are baptised, we are washed and purified once for the whole of life. Wherefore, as often as we fall, we must recall the remembrance of our baptism, and thus fortify our minds, so as to feel certain and secure of the remission of sins. For though, when once administered, it seems to have passed, it is not abolished by subsequent sins. For the purity of Christ was therein offered to us, always is in force, and is not destroyed by any stain: it wipes and washes away all our defilements. Nor must we hence assume a licence of sinning for the future (there is certainly nothing in it to countenance such audacity), but this doctrine is intended only for those who, when they have sinned, groan under their sins burdened and oppressed, that they may have wherewith to support and console themselves, and not rush headlong into despair. Thus Paul says that Christ was made a propitiation for us for the remission of sins that are past ( Rom. 3:25 ). By this he denies not that constant and perpetual forgiveness of sins is thereby obtained even till death: he only intimates that it is designed by the Father for those poor sinners who, wounded by remorse of conscience, sigh for the physician. To these the mercy of God is offered. Those who, from hopes of impunity, seek a licence for sin, only provoke the wrath and justice of God.
Source
source-manifest/institutes— Calvin, Institutes of the Christian Religion, tr. Beveridge 1845 (PD)- evidence_grade: D_doctrinal_textbook