Sacraments Reinforcing Faith
The sacraments do not work faith but reinforce it, as a wedding ring reinforces love. They do not infuse a physical grace but confer the whole Christ, whom believers already possess by the Word. They bestow on them that same Christ in another way and by another road and so strengthen the faith.
Herman Bavinck, Reformed Dogmatics: Holy Spirit, Church, and New Creation, ed. John Bolt, trans. John Vriend, vol. 4 (Grand Rapids, MI: Baker Academic, 2008), 489.