It may be asked: what are the signs of true conviction of sin, as distinct from the mere smart of a natural bad conscience or the mere disgust at life which any disillusioned person may feel?
The signs seem to be three in number.
1. Conviction of sin is, essentially, an awareness of a wrong relationship with God, not just with one’s neighbor or one’s own conscience and ideals for oneself, but with one’s Maker, the God in whose hand one’s breath is and on whom one depends for existence every moment. To define conviction of sin as a sense of need, without qualification, would not be enough; it is not any sense of need, but a sense of a particular need – a need, namely, for restoration of fellowship with God. It is the realization that, as one stands at present, one is in a relationship with God that spells only rejection and retribution and wrath and pain, for the present and the future; and a realization that this is an intolerable relationship to remain in and, therefore, a desire that, at whatever cost and on whatever terms, it might be changed. Conviction of sin may center upon the sense of one’s guilt before God or one’s uncleanness in His sight or one’s rebellion against Him or one’s alienation and estrangement from Him but, always, it is a sense of the need to get right, not simply with oneself or other people, but with God.
2. Conviction of sin always includes conviction of sins: a sense of guilt for particular wrongs done in the sight of God, from which one needs to turn and be rid of them if one is ever to be right with God. Thus, Isaiah was convicted specifically of sins of speech (Isaiah 6.5) and Zacchaeus of sins of extortion (Luke 19.8).
3. Conviction of sin always includes conviction of sinfulness: a sense of one’s complete corruption and perversity in God’s sight and one’s consequent need of what Ezekiel called a “new heart” (Ezekiel 36.26), and our Lord a “new birth” (John 3.3ff), i.e., a moral re-creation. Thus, the author of Psalm 51 – traditionally identified with David, convicted of his sin with Bathsheba – confesses not only particular transgressions (verses 1-4) but, also, the depravity of his nature (verses 5-6) and seeks cleansing from the guilt and defilement of both (verses 7-10). Indeed, perhaps the shortest way to tell whether a person is convicted of sin or not is to take him through Psalm 51 and see whether his heart is, in fact, speaking anything like the language of the psalmist.
From: Evangelism and the Sovereignty of God by J. I. Packer (Downers Grove: InterVarsity Press, 1961), pp. 62-63.
James Innell Packer (born in 1926) is an English-born Canadian Anglican theologian and prolific author.