You may spoil the Gospel by interposition. You have only to push something between Christ and the eye of the soul, to draw away the sinner’s attention from the Saviour, and the mischief is done. . . .

You may spoil the Gospel by disproportion. You have only to attach an exaggerated importance to the secondary things of Christianity, and a diminished importance to the first things, and the mischief is done. Once alter the proportion of the parts of truth, and truth soon becomes downright error! . . .

You may completely spoil the Gospel by confused and contradictory directions. Complicated and obscure statements about faith, baptism, Church privileges, and the benefits of the Lord’s Supper . . . are almost as bad as no statement at all!⁶

The gospel can be spoiled, though not objectively, for it is an objective reality. Yet it can be spoiled by us and to us. We can modify the gospel, either deliberately or inadvertently, stripping it of its power and its glory. We can bring to people a counterfeit gospel that is no gospel at all. It is the discipline of discernment that God has provided us to guard the purity of the gospel.

Discernment, then, is not an end in itself. Rather, discernment is the means to a far greater and nobler end. By practicing spiritual discernment we guard the gospel, the message of eternal life. The apostle Paul, writing to his young protégé Timothy, called him to do just this in both of the letters to Timothy recorded in Scripture. “O Timothy, guard the deposit entrusted to you,” Paul writes in 1 Timothy 6:20. In his next letter he reiterates, “By the Holy Spirit who dwells within us, guard the good deposit entrusted to you” (2 Tim. 1:14). Through the power of the Spirit, Timothy was to guard the gospel.

This word deposit is taken from the ancient world. In the age before personal safes and safe deposit boxes, a person who was going to be away for some time might ask another to care for a treasured possession. He would entrust this possession to another, depositing it to him, and this person was bound by a sacred oath to protect it.⁷ In his letters to Timothy, Paul, who knows that he will not always be able to encourage and mentor Timothy, entrusts to him the gospel message. Timothy would be expected to guard this message and to find worthy, godly Christians to whom he could in turn entrust it. And so the gospel has been protected and has carried from one generation to the next through the long, storied history of the church. And so it has been handed in trust to you and to me and to all who believe.

John Stott, in his introduction to his commentary on 2 Timothy, says this:

The church of our day urgently needs to heed the message of this second letter of Paul to Timothy. For all around us we see Christians and churches relaxing their grasp of the gospel, fumbling it, in danger of letting it drop from their hands altogether. A new generation of young Timothys is needed, who will guard the sacred deposit of the gospel, who are determined to proclaim it and are prepared to suffer for it, and who will pass it on pure and uncorrupted to the generation which in due course will rise up to follow them.⁸