LC.168: What Is the Lord's Supper?

Westminster Larger Catechism

Question 168: What is the Lord's Supper?

Answer: "The Lord's Supper is a sacrament of the new testament, wherein, by giving and receiving bread and wine according to the appointment of Jesus Christ, his death is showed forth; and they that worthily communicate feed upon his body and blood, to their spiritual nourishment and growth in grace; have their union and communion with him confirmed; testify and renew their thankfulness, and engagement to God, and their mutual love and fellowship each with other, as members of the same mystical body."