The Baptist Catechism

Q.96: How do baptism and the Lord’s Supper become effectual means of salvation?

A. Baptism and the Lord’s Supper become effectual means of salvation, not for any virtue in them, or in him that does administer them, but only by the blessing of Christ, and the working of the Spirit in those that by faith receive them.

Therefore I make known to you that no one speaking by the Spirit of God calls Jesus accursed, and no one can say that Jesus is Lord except by the Holy Spirit.        1 Corinthians 12:3