

I. Those whom God effectually calleth he also freely justifieth;a not by infusing righteousness into them, but by pardoning their sins, and by accounting and accepting their persons as righteous: not for anything wrought in them, or done by them, but for Christ’s sake alone; nor by imputing faith itself, the act of believing, or any other evangelical obedience to them, as their righteousness; but by imputing the obedience and satisfaction of Christ unto them,b they receiving and resting on him and his righteousness by faith; which faith they have not of themselves, it is the gift of God.c
a. Rom 3:24; 8:30. b. Jer 23:6; Rom 3:22, 24-25, 27-28; 4:5-8; 5:17-19; 1 Cor 1:30-31; 2 Cor 5:19, 21; Eph 1:7; Titus 3:5, 7. c. Acts 10:44; 13:38-39; Gal 2:16; Eph 2:7-8; Phil 3:9.
-Westminster Confession of Faith (1646), 11.1
“No other sufficient cause can possibly be assigned of this propagation the gospel, but only God’s own power. Nothing else can be devised as the reason of it but this. Their was certainly some reason Here was a great and wonderful effect the most remarkable change that ever was in the face of the world of mankind since the flood; and this effect was not without some cause. Now, what other cause can be devised but only the divine power? It was not the outward strength of the instruments which were employed in it. At first, the gospel was preached only by a few fishermen, who were without power and worldly interest to support them. It was not their craft and policy that produced this wonderful effect; for they were poor illiterate men. It was not the agreeableness of the story they had to tell to the notions and principles of mankind. This was no pleasant able: a crucified God and Saviour was to the Jews a stumbling-block, and to the Greeks foolishness. It was not the agreeableness of their doctrines to the dispositions of men: for nothing is more contrary to the corruptions of men than the pure doctrines of the gospel. This effect therefore can have proceeded from no other cause than the power and agency of God: and if the power of God was what was exercised to cause the gospel to prevail, then the gospel is his word; for surely God does not use his almighty power to promote a mere imposture and delusion.”
-Jonathan Edwards (1703–1758)
A pretty good, short overview of the question from the Scriptures. Open your mind to God, and go deaf to the culture and your own deceitful heart!
My only caveat is that the speaker uses a Bible version that translates the Greek word porneia as “sexual immorality” and not “fornication.” I prefer the latter, since the former is too vague. But other than that, the content is spot-on.
“It is appointed unto men once to die, but after that the judgment” (Heb. 9:27). This teaches that prior to death, man’s destiny is not decided, he being not yet sentenced; but after death, his destiny is settled. When he dies, the “private judgment,” that is, the immediate personal consciousness either of penitence or impenitence, occurs. Every human spirit, in that supreme moment when it “returns to God who gave it,” knows by direct self-consciousness whether it is a child or an enemy of God, in temper and disposition; whether it is humble and contrite, or proud, hard, and impenitent; whether it welcomes or rejects the Divine mercy in Christ. The article of death is an event in human existence which strips off all disguises, and slows the person what he really is, in moral character. He “knows as he is known,” and in this flashing light passes a sentence upon himself that is accurate. This “private judgment” at death, is reaffirmed in the “general judgment” of the last day.
-W.G.T. Shedd

“The consummation of spiritual death in matter of loss, is a total and final forsaking, whereby a man is separated wholly from the face, presence, and favour of God. Mat 7.23, Depart from me. And 25.41, Go you cursed. 2 Thess. 1.9, Who shall be punished with everlasting destruction, being driven from the Face of the Lord, and the glory of his Power.”
From William Ames’ (1576-1633) “The Consummation of Death,” in Marrow of Theology, 1.16.
“Christ is all, and in all” (Col. 3:11).
“He that hath God for his portion, hath all things, because God is all things; he is a good that contains all good in himself. All the good that is to be found in honours, in riches, in pleasures, in preferments, in husband, in wife, in children, in friends, etc., is to be found only and eminently in God. You have all in that great God that is the saints’ great All.”
-Thomas Boston