In Acts Jesus said, "You shall be My witnesses both in Jerusalem and in all Judea and Samaria and unto the uttermost part of the earth" (1:8). To witness is to speak something, which is to prophesy. To be a good witness of Christ, we must be able to prophesy. Romans 10:17 tells us, "Faith comes out of hearing, and hearing through the word of Christ," If we do not know how to prophesy, people will not be able to hear God's word. What is the word that people should hear? It is not merely, "Honor your parents," "Love your neighbors," and "Do not steal." If we go as members of a vital group to visit people and speak these things, they will reject us. We must go to people to prophesy concerning the high peak of God's revelation, including the high peak of God, the high peak of Christ, the high peak of the Spirit, and the high peaks of the divine life, the church, the Body of Christ, the constitution of God and man, and the New Jerusalem. We must know how to prophesy concerning the New Jerusalem. We can visit someone and say, "Sir, I come here with a burden to tell you that at the end of the Bible there is a city." When he asks if this is a heavenly mansion, we can say, "It is the New Jerusalem, of which the base is God, the gates are Christ, and the wall is the Spirit." He will want to hear this, and he will invite us to come again. Many years ago when we composed our hymnal, I included a number of songs on the New Jerusalem (see Hymns, #971-972, 975-976, 978-980). This indicates that I was able not only to prophesy about the New Jerusalem but also to make a song out of my prophecy. We must all be able to prophesy concerning the New Jerusalem. In 2 Timothy 4:2 Paul says, "Proclaim the word; be ready in season and out of season." To proclaim the word is to prophesy at every time, in season and out of season. In the training we are building you up to know the eight foregoing items of the truth and to prophesy concerning these things.