The two restored demoniacs were the first missionaries whom Christ sent to preach the gospel in the region of Decapolis. For a few moments only, these men had been privileged to hear the teachings of Christ. Not one sermon from His lips had ever fallen upon their ears. They could not instruct the people as the disciples who had been daily with Christ were able to do. But they bore in their own persons the evidence that Jesus was the Messiah. They could tell what they knew; what they themselves had seen, and heard, and felt of the power of Christ. This is what every one can do whose heart has been touched by the grace of God. John, the beloved disciple, wrote: “That which was from the beginning, which we have heard, which we have seen with our eyes, which we have looked upon, and our hands have handled, of the Word of life; ... that which we have seen and heard declare we unto you.” 1 John 1:1-3L. As witnesses for Christ, we are to tell what we know, what we ourselves have seen and heard and felt. If we have been following Jesus step by step, we shall have something right to the point to tell concerning the way in which He has led us. We can tell how we have tested His promise, and found the promise true. We can bear witness to what we have known of the grace of Christ. This is the witness for which our Lord calls, and for want of which the world is perishing.—The Desire of Ages, 340.