The means of the word, ordinances and prayer

"The grace of faith, whereby the elect are enabled to believe to the saving of their souls, is the work of the Spirit of Christ in their hearts, and is ordinarily wrought by the ministry of the Word; by which also, and by the administration of baptism and the Lord's supper, prayer, and other means appointed of God, it is increased and strengthened." -- The London Baptist Confession of Faith of 1689, 14:1