An "Open Door" is an opportunity given by God to us so that we can experience the presence of Christ, the purpose of God, and the power of the Holy Spirit. Thus, it is our foretaste of heaven on earth. But how do we know if an "Open Door" is actually set before us by God? What if we are wrong? How can we be sure? In other words, how do we discern an "Open Door"? The answer? We need to TEST it.