Our Lord has given his people two sacraments–Baptism and the Lord’s Supper. He instituted them both for our benefit. The Westminster Shorter Catehism defines a “sacrament” with these helpful words,
Q. #92: What is a sacrament?
A. A sacrament is a holy ordinance instituted by Christ, wherein by sensible signs, Christ and the benefits of the new covenant, are represented, sealed, and applied to believers (#1).
(#1) Gen. 17:7, 10; Exod. 12; 1 Cor. 11:23, 26
Thus, when we receive the Lord’s Supper the sacrificial work of Jesus Christ is represented by the elements. Secondly, the promises and blessings of God are sealed in our hearts–taking on fresh meaning as we are urged to greater obedience to his commandments. Lastly, the benefits of the new covenant are applied to believers; such benefits as–assuance, courage, faithfu, love, and perseverance. Rejoice, then, that our Lord has give us sensible signs where we can be encouraged and strengthened. He has not left his people helpless. He loves us and he continues to reassure us that we belong to him.
[podcast]http://www.download.covenantfamilychurch.net/2008/mp3/2008_8_3_the_lords_supper_its_instititution_by_christ.mp3[/podcast]
Covenant Family Church is a conservative, Bible-believing, and elder-governed congregation located in Wentzville, MO which seeks to evangelize the lost and equip those who have been converted to walk worthy of their calling in Christ. 
The Orthodox Presbyterian Church continues to be vigorous in its defense and propagation of the historic Christian faith, particularly as it was articulated by the Protestant Reformers of the 16-17th centuries. 
What led you to visit our website today? What are you seeking? Can we talk about that? Why don't you 
Seek the Lord while He may be found, call upon Him while He is near. Let the wicked forsake his way, and the unrighteous man his thoughts; let him return to the Lord, and He will have mercy on him...