"Now the end of the commandment (charge) is charity out of a pure heart, and of a good conscience, and of faith unfeigned"–1 Tim. 1:5.
Make no mistake, God Almighty has ordained the preaching of the gospel as the means to call out His people, to communicate life to them and to build them up in the faith (1 Cor. 1:21; Titus 1:3). When Paul writes to Timothy concerning the ministry given to him, he makes certain that he understands the importance of the charge given in preaching the gospel (1 Tim. 1:18) and the need to defend it at all cost (2 Tim.4:1-5). Paul assures Timothy that God will bless the preached word to the salvation of His sheep. Three things gospel preaching produces in us!
1). LOVE OUT OF A PURE HEART!No man has this naturally (Rom.8:7; John 3:19), every man's heart is naturally impure (Jer.17:9). Nor can the sinner make his heart pure by the deeds of the flesh (Rom.3:9-12). However, the promise of the gospel is to give us a new heart (Ezk.11:19-20), a new nature (2 Cor. 5:17), heart and soul cleansed by the blood sacrifice of Christ (1 John 1:7). This new heart worships God, bows to His will and owns, embraces the Lord Jesus Christ as everything in salvation (Col.2:9-10; 3:11; 1 Cor.1:30).
2). GOOD CONSCIENCE!Our conscience like our heart is naturally defiled by sin, "unto them that are defiled and unbelieving is nothing pure; but even their mind and conscience is defiled" (Titus 1:15). Our defiled conscience takes no notice of, no remorse for and is not concerned about our sin nature. It speaks peace to a guilty heart on the false foundation of human merit (Luke 16:15). Through the preaching of the gospel, our sin is exposed (Rom.5:12), our conscience is convicted by the Holy Spirit (John 16:8-11) and our conscience is purged from dead works to serve the living God by the blood atonement of Christ (Heb.9:14).
3). FAITH UNFEIGNED!The scriptures have given to us many examples of feigned (false) faith and temporary faith. Paul makes mention of several in this letter to Timothy, "some having put away concerning faith have made shipwreck: of whom is Hymenaeus and Alexander" (1 Tim. 1:19-20). The preaching of the gospel brings the fruit of true, genuine and enduring faith. Faith that is born of the Word (Rom.10:17). Faith that works by love (Gal. 5:6). Faith that looks to Christ alone (Heb.12:2). Faith that glories in Christ crucified (Gal. 6:14).
In these three things we see the biography of the believer through the gospel. A new and pure heart of love, produces a purged conscience, which is experienced by genuine and abiding faith in Christ!