There is a deceitfulness in sin by which men are deluded so as to form wrong judgments as to its nature, its extent, its turpitude and power. This delusion must be dispelled. Conviction of Sin
There are two things which those who, after a long profession of the
gospel, are entering into the confines of eternity do long for and desire. The one is, that all their breaches may be repaired, their decays recovered, their backsliding healed; for unto these things they have been less or more obnoxious in the course of their walking before God. The other is, that they may have fresh springs of spiritual life, and vigorous acting of all divine graces, in spiritual-mindedness, holiness, and fruitfulness, unto the praise of God, the honor of the gospel, and the increase of their own peace and joy.
Is it nothing unto us that so many nations in the world, where the profession of the gospel and an avowed subjection of soul and conscience unto Jesus Christ did flourish for some ages, are now utterly overrun with Mohammedanism, paganism, and atheism? Do we suppose these things are fallen out by chance, or come to pass by a fatal revolution of affairs, such as all things in this world are obnoxious unto? Did ever any nation or people under heaven lose the gospel as unto its profession, who did not first reject it as unto its power, purity, and obedience? And is not the glory of God, is not the honor of Christ, peculiarly concerned herein?
Sinners are not unjustly condemned for their depravity, but that their inability is blameworthy. Great care needs to be taken in stating this doctrine accurately. Otherwise men will be encouraged to put it to wrong use, making it a comfortable resting place for their corrupt hearts. By a misrepresentation of this doctrine more than one preacher has “strengthened the hands of the wicked, that he should not return from his wicked way” (Ezek. 13:22).
Dagg, born in 1794, in Loudoun County, Virginia, lived to be over 90 years old. He died in June of 1884, as one of the most respected men in Baptist life and remains one of the most profound thinkers produced by his denomination. The diversity of his works demonstrates this. from Founders.org
From the Founders Web Site The voluminous amount of material, the persuasiveness of his arguments, and the relevance of his insights show these works to be extraordinary for a man under normally healthy circumstances. However, if one realizes that Dagg was virtually blind, mute and lame at the time of his greatest productivity the accomplishment exceeds comprehension.
A Sermon from the book, Sermons and Essays by the Tennents and their Contemporaries 
The proofs of man’s depravity
The premium of three hundred dollars which was awarded to the writer of the Following Essay, was offered by Mr. John Dunlop of Edinburgh, Scot- land* The Judges appointed were, the Reverend Jeremiah Day, D. D. L. L. D. President of Yale Colleqe, the Reverend Edward D. Griffin, D. D* President of Williams Col- lege, and the Reverend Heman Humphrey, D. D. President of Amherst College. The publication of the Essay was delayed some time, for the purpose of receiving the directions of Mr. Dunlop.