Pietism
...pietism is bound to external means. It may limit these means and want nothing to do with a catechism or dogmatics; yet, it tries to lead children to conversion by speaking to them of the dear Jesus. There is in fact no road to the human heart other than that which runs through the head and consciousness.
Herman Bavinck, Reformed Dogmatics: Prolegomena, ed. John Bolt, trans. John Vriend, vol. 1 (Grand Rapids, MI: Baker Academic, 2003), 570.