ST. PAUL concludes his first Epistle to the Corinthians with this remarkable direction; "If any man love not the Lord Jesus, let him be Anathema, Maranatha:" that is, Let him be separated from your communion, as one under the displeasure of God, and, without a timely repentance, in no possibility of being saved: nothing being more grievous in the sight of God, than for a sinner to slight the greatest instance of His mercy that was ever offered to man, as well as the only means of his salvation.
To prevent this, and to hinder sinners from forgetting (which they are but too apt to do) this token of God's infinite love, and to fix the love of Jesus Christ more surely in our hearts and memory, He Himself hath taken care, that His  love and mercy should throughout all generations be remembered: He did therefore ordain this Sacrament as a memorial of our redemption, and of His love for us, as a pledge to assure us of it, and as an outward means and sign of testifying, as well as increasing, our love to Him.
The holy Apostles of Christ, who were present when He first administered this Sacrament, give us the following account of its institution:
They signify to us in the first place, that this Sacrament was ordained by Christ the same night in which He was betrayed; and after they had observed the Passover, which had been ordained to preserve the memory of their great deliverance from the bondage of Egypt, and which did prefigure, and was a prophecy of a much greater deliverance, which Jesus Christ was to be the Author of, not only for them, but for all mankind: and which prophecy was surprisingly fulfilled by that people, without knowing what they were doing [d], when they crucified Jesus Christ, the true Paschal Lamb, the very same month, the very same day of the month, and the very same hour of the day, that the Paschal Lamb was first ordained to be sacrificed.
Now, after the Paschal Supper, as the Apostles relate it, "Jesus Christ took bread and blessed it, and brake it, and gave it to His disciples, saying, Take, eat: this is My Body, which is given for you: this do in remembrance of Me. He took also the cup, and gave thanks, and gave it to them, saying, Drink ye all of this; for this is My Blood of the new covenant, which is shed for you, and for many, for the remission of sins: this do, as oft as ye shall drink it, in remembrance of Me. For as oft as ye shall eat this bread, and drink this cup, ye do shew forth the Lord's death till He come."
In obedience therefore to this command of Jesus Christ, who has delivered us from a much greater bondage then that of Egypt, the Christian Church keeps up the memory of His love, His sacrifice, and His sufferings, and death, after this solemn manner:
First, as an acknowledgement that our lives, and all that we eat or drink to preserve them, are owing to the bounty of God, we present upon His table, by the hands of His own  Minister, a portion of His creatures, the best we have for the support and comfort of our natural life, namely, bread and wine. After this the bread and wine are consecrated, the bread is broken, and the wine poured out, to represent the death of Christ, whose body was broken, and whose blood was shed for us.
The Minister of God, as the steward of Christ's household, applies these blessings to every person who receives this Sacrament, in this devout prayer; "The Body and Blood of Christ, which were given and shed for thee, preserve thy body and soul unto everlasting life."
And we may be assured of it, that this Sacrament will be to every worthy communicant, what the tree of life would have been unto Adam and Eve in Paradise; and that as they, had they continued obedient, would have been in no danger of temporal death; even so we, while we feed on this bread, now endued with a life-giving Spirit, and live as we ought to do, are in no danger of death eternal.
These being pledges to assure us, that as certainly as bread and wine do nourish our bodies, so do these seal to us all the benefits which Jesus Christ hath purchased for us by His sacrifice and death.
And when any Christian does wilfully, and for want of faith, deprive himself of this spiritual food, he falls, as our first parents did, into a state purely natural, and destitute of the means of grave and salvation.
For the happiness of the world, and of every soul in it, depends upon the sacrifice of Christ; of which we are bound to keep up the remembrance after this solemn manner: That, whenever we pray for any favour or blessing, we may remember to do it in His name: That, whenever we are so unhappy as to have done any thing which may displease God, we may remember to pray to be forgiven for Christ's sake.
For God grants whatever we ask, and which He sees to be for our good, when we ask in faith, that is, in His Son's name; and therefore the Church concludes all her prayers in these most prevailing words; for Jesus Christ's sake.
In one word; we do by this Sacrament keep up a continual correspondence with our Lord in Heaven; and hold communion with Him, and with all the members of His  Body, which receive nourishment and growth from Him, as the branches of the tree in which they are grafted, and from which when they are separated, they can bear no fruit, and are only fit to be burned.
And as every Christian is obliged, at the peril of his soul, to observe it, so the duty must be such, as every one, even the most unlearned, may understand, if it be not his own fault. And so indeed it is: for as an Israelite, under the Law (Levit. i. 4), being obliged to lay his hand upon the head of his sacrifice, confessing his sins, and laying them, as it were, upon that creature,--as he did easily understand that this was to shew him that death was the due reward of sin; that this ought to humble him before God, and to give him the greatest abhorrence of sin, which could not be pardoned but by the loss of the life of an innocent creature:--
As this was plain to the meanest Israelite, even so the most unlearned Christian, when he considers that our Lord Jesus Christ became a sacrifice for us, and that on Him all our sins were laid,--on Him who knew no sin;--he will easily understand how sad our condition was, which required such a sacrifice: that this therefore ought to humble us, to lead us to repentance, to make us fearful of offending God, and to abhor those sins which cost Jesus Christ His life, before God could be prevailed with to pardon them.
He will also easily understand, that the love of Christ, and the remembrance of His death, ought to be very dear to us; and that the oftener we remember it in the manner He ordained, the more graces we shall receive from God, the firmer will be our faith, the surer our pardon, and the more comfortable our hopes of meeting Him, not as an enemy but as a friend, at whose table we have been so often entertained.
And now, if you have considered what you have read with any degree of attention, you will pause awhile, until you have expressed your gratitude for this mercy, after some such manner as this following:
O JESUS! who hast loved us, and washed us from our sins, and purchased us by Thy own blood, and didst ordain this Sacrament in order to secure us to Thyself, by a grateful remembrance  of what Thou hast done and suffered for us; make me truly sensible of Thy love, and of our sad condition, which did require such a sacrifice.
May I always receive this pledge of Thy love, the offers of mercy, pardon, and grace, tendered to us in this holy Ordinance, with a thankful heart, and in remembrance of Thee, our great and best benefactor; in remembrance of Thy holy example, of Thy heavenly doctrine, of Thy laborious life, of Thy bitter passion and death, of Thy glorious resurrection, of Thy ascension into Heaven, and of Thy coming again to judge the world!
And may I never forget the obligations [e] Thou hast laid upon us, to live as becomes Thy disciples; and to forsake every course of life contrary to Thy Gospel. Cease not, O Lord, to love us; and by the grace vouchsafed in this Ordinance, cause us to love Thee with all our hearts. Amen.
[d] "a doing"