But How Shall I Get Faith? by Walter Marshall
Question. But how shall I get faith?
Answer. Faith is the gift of God (Ephesians 2:8), and by the gospel (Romans 1:15-17). Faith comes by hearing the gospel preached (Romans 10:17), and that comes in working faith, not in word only, but in power (1 Thessalonians 1:5), beyond what can be done by natural or human attainment (John 6:63). Therefore, if you have no beginning of it in you, your only way is to attend to the gospel and to meditate on your sin and misery and Christ's excellency, that so you may be inclined in your heart to believe (Song of Solomon 1:3; Galatians 2:16; Psalm 9:10), for this is the way God uses to beget faith (Isaiah 55:3). But if you have a desire and inclination to fly from yourself to Christ, in the bent of your heart, so that you prefer Christ above all, then the Spirit has begun and will carry on the work, so that now you may pray confidently for faith (Song of Solomon 1:4; Luke 11:13; Mark 9:24).
From his sermon: The Doctrine of Justification Opened and Applied found in the Appendix of:
The Gospel Mystery of Sanctification: Growing in Holiness by Living in Union with Christ by Walter Marshall