
A diploma has a seal on it, placed there by the faculty and trustees of the school, authenticating what the diploma says. Paul uses that language in Romans 4:11 as he teaches us something about the sacraments.
The covenant sign is a seal of your faith. God ordained a sign of his covenant with Abraham. The heart of the covenant is fellowship between God and his people. It includes the other things promised to Abram, the land, an heir, becoming the father of a great nation, etc., Genesis 17:6, 8. But the heart of covenant fellowship is “I will be your God and you will be my people.” Genesis 17:7. The sign points to the existence of what it signifies. Golden arches point to a fast food place. The sign itself doesn’t feed you. The Bible doesn’t use the word sacrament (nor does it use the word Trinity), but it refers to the signs and seals God has ordained as signs of the covenant. The don’t replace the Word of God, but God has ordained them for us in addition to the Word. They have been described as the Word in visible form. The sign of circumcision pointed to the reality of covenant fellowship, to the reality of Abram’s trust in God. Recognize that the sacraments function in two directions. We are saying something to God, but, even more importantly, God is saying something to us.
Continue reading “Sealing the Promise”“In the sacrament God first comes to believers to signify and seal his benefits. He assures them with visible pledges that he is their God and the God of their children. He attaches seals to his Word to strengthen their faith in that Word (Gen. 9:11–15; 17:11; Exod. 12:13; Mark 1:4; 16:16; Luke 22:19; Rom. 4:11; and so forth). On the other hand, the sacraments are also an act of confession. In them believers confess their conversion, their faith, their obedience, their communion with Christ and with each other. While God assures them that his is their God, they solemnly testify that they are his children. Every observance of the sacrament is an act of covenant renewal, a vow of faithfulness, an oath that obligates those who take it to engage in the service of Christ (Mark 1:5; 16:16; Acts 2:41; Rom. 6:3ff.; 1 Cor. 10:16ff.).”
Herman Bavinck, Reformed Dogmatics, Vol. 4, pages 476–476





