God gave man a conscience for this very reason. Godly sorrow leads to repentance while worldly sorrow leads to death (cf. II Cor. 7:10). When a person is convicted of sin, his heart will be pricked--either for the better or worse. Consider two very different outcomes when people were informed of their sins:
Tragically, there are those today who try the path of compromise with one foot in the world and the other in the church. James speaks of the "double-minded" man (James 4:8). He wants the pleasures of the world while simultaneously seeking to feel acceptable to God. This person is "unstable in all his ways" (James 1:8). Undivided loyalty to Jesus and His word keeps the Christian stable (cf. II Tim. 1:7,13).
Friends, does your religion make you thoroughly miserable? If so, you have a choice to make. Will you abandon the Savior and resign yourself to a life enslaved to sin? That decision leads to eternal condemnation (cf. Rom. 6:16). The preferable choice is to embrace the love of God and eternal life. This is accomplished by leaving the life of sin and its hypocrisy. It takes resolve of heart to repent but it brings great joy (e.g., Luke 15:17-24). One must truly let go of the ways of the world if he wants to have peace and joy with the Lord!
In order to know the joy of the Christian life, one must have more than just a little religion. It requires growing "in the grace and knowledge of our Lord and Savior Jesus Christ" (II Pet. 3:18). God's word has great power for those who want to do what is right (cf. Heb. 4:12; I Thess. 2:13). It can change one from being a miserable wretch into a victorious child of God!
The excellent article above was written by Douglas Hoff (with some minor editing on my part). Those who are wise will seriously reflect upon their lives as a new year begins. What direction are you headed spiritually? Are you fully dedicated to serving God or are you foolishly trying to serve two masters? "No one can serve two masters; for either he will hate the one and love the other, or else he will be loyal to the one and despise the other. You cannot serve God and mammon" (Matt. 6:24; cf. 16:24-27)?