Read 1 Corinthians 2:6-8
6-8 We do, of course, speak “wisdom” among those who are spiritually mature, but it is not what is called wisdom by this world, nor by the powers-that-be, who soon will be only the powers that have been. The wisdom we speak of is that mysterious secret wisdom of God which he planned before the creation for our glory today. None of the powers of this world have known this wisdom—if they had they would never have crucified the Lord of glory! (JBP)
Some people become Christians through some overwhelming emotional encounter with God. There is a deep sense of being forgiven, of being set free. Others become Christians by a more objective weighing up of the evidence. There is a recognition that the Christian faith makes best sense of the world and of us: what is good and not so good about the world and us. They appreciate the wisdom of the faith: it makes sense.
Yet others, more dangerously, decide to follow Jesus because they figure it will help them get along in life. Success in relationships, health, wealth and career will be more likely if we have Jesus on our side. So the faith becomes more like a means to another end. Such a faith is fragile: when adversity strikes, the very reason for following Jesus is rendered useless. It hasn’t worked so we give it up.
Of course Christianity is helpful in life. But it is only helpful inasmuch as it is true. Not much point in embracing a faith if it has no basis in truth. Believing a lie in order to feel better or to advance one’s interest is an exercise in folly rather than wisdom.
I personally follow Jesus ultimately because he offers the best explanation of who I am and what the world is like. The fact that it is helpful is incidental. C.S. Lewis once wrote that Christianity, if not true, is of no importance. If it is true, it is of the utmost importance. The one thing it cannot be is moderately important.