Subjective Celebration of the Lord's Supper - Chrysostom

If you approach the altar on the very day of the Sabbath and your conscience be bad, you fail to share in the mysteries and you leave without celebrating the Pasch. But if you wash away your sins and share in the mysteries today, you do celebrate the Pasch in precisely the proper way. Fathers of the Church, St. John Chrysostom, Discourses Against Judaizing Christians, translated by Paul W. Harkins, Discourse III, section V, paragraph 2 (p. 63)