I really believe that the problem of not knowing our spiritual gifts is not a basic problem. More basic is the problem of not desiring very much to strengthen other people’s faith. Human nature is more prone to tear down than it is to build up. The path of least resistance leads to grumbling and criticism and gossip, and many there be that follow it. But the gate is narrow and the way is strewn with obstacles which leads to edification and the strengthening of faith. So the basic problem is becoming the kind of person who wakes up in the morning, thanks God for our great salvation and then says, “Lord, O how I want to strengthen people’s faith today. Grant that at the end of this day somebody will be more confident of Your promises and more joyful in Your grace because I crossed his path.” The reason I say becoming this kind of person is more basic than finding out your spiritual gift, is that when you become this kind of person the Holy Spirit will not let your longings go to waste. He will help you find ways to strengthen the faith of others and that will be the discovery of your gifts. So let’s apply ourselves to becoming the kind of people more and more who long to strengthen each other’s faith
John Piper