A book on chastity may not seem relevant to teenagers necking in a parked car. First-aid kits don’t seem relevant to two boys beginning a scuffle. Wedding vows don’t appear relevant to a person plunging into an affair. When we are morally committed to a course of action, it narrows the horizon of what we see as important, practical, or useful.
We live in a culture which is furiously committed to sexual perversion, to a life of diversionary amusements, and to the accumulation of creature comforts. Avid participants in this culture will have a very different view of relevance to that of a faithful Christian.
For a Christian, relevance is determined by a permanent standard: what pleases God, as revealed in Scripture. This standard is nuanced by our historical understanding of the Christian faith. With this in place, a Christian rejects several mangled forms of the idea of relevance.
First, relevance is not determined by how current or novel something is. The idols of contemporaneity, “progress”, and innovation have no intrinsic purchase on whether something is valuable, useful, or pertinent. To equate relevance with novelty is a sub-Christian understanding of the world.
Second, relevance is not determined by how popular and useful something seems to a generation wise in their own eyes. If Proverbs teaches us anything, it is that fools feel quite justified in their self-destructive path, and openly scoff and mock the way of wisdom.
Third, relevance is not determined by how easily understood and plausible something seems to others. A lack of spiritual understanding is charged as spiritual dullness and immaturity, not as a faulty message or failure to connect.
Fourth, relevance is not determined by how notorious and famous something becomes. The cream rises to the top, they say, but so does the scum. When all men speak well of you, you are in mortal danger, said Jesus.
A Christian understands relevance because he understands what man is, and what man is for. If you understand man as a creature made by and for God, you can understand what has, as Webster’s defines it “significant and demonstrable bearing” on his existence.
In this sense, relevance is determined by whoever is making the judgement. If the beholder is an unbeliever committed to self-rule and self-indulgence, you can be sure the claims of Christianity will seem “irrelevant” to him. Our goal is not to “make Christianity relevant” to him. Our goal is to show him his whole concept of what is valuable is skewed and rebellious. In other words, the only way for a rebel to consider Christianity relevant is if he becomes, by regeneration, a worshipper.