Practice of Piety 48 - Of the second End of the Lord's Supper.
By Lewis Bayly

      2. To confirm our faith; for God by this sacrament doth signify and seal unto us from heaven, that according to the promise and new covenant which he hath made in Christ, he will truly receive into his grace and mercy all penitent believers who duly receive this holy sacrament; and that for the merits of the death and passion of Christ, he will as verily forgive them all their sins as they are made partakers of this sacrament. In this respect the holy sacrament is called "the seal of the new covenant and remission of sins." (Rom. iv. 11; Matt. xxvi. 28; 1 Cor. xi. 25.)

      In our greatest doubts we may, therefore, receiving this sacrament, undoubtedly say with Samson's mother, "If the Lord would kill us, he would not have received a burnt-offering and a meat-offering at our hands, neither would he have shewed us all these things, nor would at this time have told us such things as these." (Judges xiii. 23.)