Such thoughts have led me to wonder what could be done to rouse believers to a sense of their high calling in this, and to help and train them to take part in it. And so this book differs from the former one in the attempt to open a practising school, and to invite all who have never taken systematic part in the great work of intercession to begin and give themselves to it. There are tens of thousands of workers who have known and are proving wonderfully what prayer can do. But there are tens of thousands who work with but little prayer, and as many more who do not work because they do not know how or where, who might all be won to swell the host of intercessors who are to bring down the blessings of heaven to earth. For their sakes, and the sake of all who feel the need of help, I have prepared helps and hints for a school of intercession for a month (see the Appendix). I have asked those who would join, to begin by giving at least ten minutes a day definitely to this work. It is in doing that we learn to do; it is as we take hold and begin that the help of God's Spirit will come. It is as we daily hear God's call, and at once put it into practice, that the consciousness will begin to live in us, I too am an intercessor; and that we shall feel the need of living in Christ and being full of the Spirit if we are to do this work aright. Nothing will so test and stimulate the Christian life as the honest attempt to be an intercessor. It is difficult to conceive how much we ourselves and the Church will be the gainers, if with our whole heart we accept the post of honour God is offering us. With regard to the school of intercession, I am confident that the result of the first month's course will be to awake the feeling of how little we know how to intercede. And a second and a third month may only deepen the sense of ignorance and unfitness. This will be an unspeakable blessing. The confession, "We know not how to pray as we ought," is the introduction to the experience, "The Spirit maketh intercession for us"--our sense of ignorance will lead us to depend upon the Spirit praying in us, to feel the need of living in the Spirit.