A sin...consists in doing, saying, thinking, or imagining anything that is not in perfect conformity with the mind and law of God
J. C. RyleNo doubt a man may be saved, like the penitent thief, without having received the Lord's Supper. It is not a matter of absolute and indispensable necessity, like repentance, faith, and conversion. But it is impossible to say that any professing Christian is in a safe, healthy, or satisfactory condition of soul, who habitually refuses to obey Christ and attend the Lord's Table.
J. C. Ryle