From a footnote in Ryrie’s Study Bible: “Faith is defined by Paul and James as a living, productive trust in Christ.” The act of obedience proves the reality of our faith, just as it did for Abraham when he obeyed God and offered his son as a sacrifice. If we know the right thing to do but choose not to do it, then our faith is but doubt, and doubt is unbelief which is sin. We have been given the grace to present the Truth to people and encourage the sinner to turn from the error of his way that he may be saved from condemnation and death. Let us employ this grace by faith, in obedience with rejoicing. Selah.