I originally found this quote in the Appendix to Daniel Steele’s The Gospel of the Comforter. (It is the first part of Note H.) Horace Bushnell was a Congregationalist pastor and theologian, who was quite important — and controversial — in his day. See: Wikipedia, Christian Classics Ethereal Library.
Many a time nothing is wanting but to speak as to a soul already hungry and thirsty, or, if not consciously so, ready to hunger and thirst, as soon as the bread and water of life are presented. If the problem is to get souls under sin inspired again, which it certainly is, then it is required that the preacher shall drop lecturing on religion and preach it, testify it, prophesy it, speak to faith as being in faith, bring inspiration as being inspired, and so become the vehicle, in his own person, of the power he will communicate; that he may truly beget in the gospel such as will be saved by it. No man is a preacher because he has something like or about a gospel in his head. He really preaches only when his person is the living embodiment, the inspired organ of the gospel; in that manner no mere human power, but the demonstration of a Christly and divine power. Such preaching has had, in former times, effects so remarkable. At present we are almost all under the power, more or less, of the age in which we live. Infected with naturalism ourselves and having hearers, that are so, we can hardly find what account to make of our barrenness.
— Horace Bushnell, Nature and the Supernatural: As Together Constituting the One System of God (1858).
“For by grace you have been saved through faith, and this is not your own doing; it is the gift of God—” (Ephesians 2:8 NRSV)
Many Calvinists fear that any retreat from the conviction that God causes faith will make salvation a human accomplishment. If faith is something we do, then salvation rests on our deeds and no longer on God’s grace. If faith is viewed as our part in the process of salvation, then salvation must he viewed as a cooperative affair, and we should then describe ourselves as self-saviors in part.
But the flaw in this Calvinist fear lies in its improper understanding of the nature of faith itself. The Bible itself does not describe faith as a work that accomplishes a task, or as a deed that establishes merit, or as a lever that forces God to act. Instead, we find that genuine faith is something quite different. As Paul’s treatment of Abraham shows, the patriarch’s faith had no power over God, earned no merit before God and stood as the polar opposite to honorific deeds. Abraham believed God, and righteousness was ‘credited’ to him, not paid to him. God alone justified Abraham freely on the basis of Abraham’s faith (Rom 4:1-6). Since by its very nature faith confesses the complete lack of human merit and human power, it subtracts nothing from the Savior’s grace or glory. By its very nature, faith points away from all human status and looks to God alone for rescue and restoration.
— Jerry L. Walls & Joseph R. Dongell, Why I Am Not a Calvinist (2004) pp. 77, 78.