Do we turn away from [the Lord’s Table] when it is administered? If so, how can we justify our conduct? It will not do to say it is not a necessary ordinance. To say so is to pour contempt on Christ Himself, and declare that we do not obey Him. It will not do to say that we feel unworthy to come to the Lord’s table. To say so is to declare that we are unfit to die, and unprepared to meet God. These are solemn considerations. All non-communicants should ponder them well.
J.C. Ryle