“No man can rightly understand the power of indwelling corruption who has not savingly felt his own; nor how the law is the strength of sin, till that law be closely applied to his own conscience; nor why the gospel offer of Christ as a savior must be absolutely free and made to sinners as such, till he himself has had to struggle with sharp and strong convictions. No man can rightly apprehend how the assured belief of full and free salvation through Christ constrains to universal obedience till God's redeeming love be shed abroad in his heart; nor how much a disposition that doubts and staggers at the promises of eternal life, or which leads a man to recommend himself to God's favor by his good works, tends to hinder the cheerful progress in grace and true virtue till he himself has experienced the hurt of it.”