New Covenant Gleanings from the ministry of Dr. John Piper.
The church is the new covenant community – “This cup is the new covenant in my blood” (Luke 22:20; 1 Corinthians 11:25) – we say when we take communion. The new covenant is the spiritual work of God to put his Spirit within us, write the law on our hearts and cause us to walk in his statutes. It is a spiritually authentic community. Unlike the old covenant community it is defined by true spiritual life and faith. Having these things is what it means to belong to the Church. Therefore to give the sign of the covenant, baptism, to those who are merely children of the flesh and who give no evidence of new birth or the presence of the Spirit or the law written on their heart or of vital faith in Christ is to contradict the meaning of the new covenant community and to go backwards in redemptive history.
The Church is not a replay of Israel. It is an advance on Israel. To administer the sign of the covenant as though this advance has not happened is a great mistake. We do not baptize our children according to the flesh, not because we don’t love them, but because we want to preserve for them the purity and the power of the spiritual community that God ordained for the believing church of the living Christ.
I pray that you will be persuaded of these things, and that many who have been holding back will be baptized, not to comply with any church constitution, but by faith and obedience to glorify the great new covenant work of God in your life. Have you been washed by the blood of the Lamb? Are your sins forgiven? Have you died with Christ and risen by faith to walk in newness of life? Does the Spirit of Christ dwell in you? Is the law being written on your heart? Come, then, and signify this in baptism, and glorify God’s great new covenant work in your life.