Now it is to lead its readers to a personal experience of all this that this book has been written. No mere intellectual assent to the truth it sets forth can satisfy its author, any more than it can benefit his readers. What he seeks, and what I join him in devoutly asking of God, is that you, dear friend, who may take this little volume into your hands, may see what an infinite privilege is yours, and may begin to act with God the Holy Ghost, and to open your whole being to Him, that He may work with you. BRAMWELL BOOTH. LONDON, January, 1909. I. WHO IS HE? "Ye shall receive power after that the Holy Ghost is come upon you." On that last eventful evening in the upper room, just after the Passover feast, Jesus spoke to His disciples about His departure, and, having commanded them to love one another, He besought them not to be troubled in heart, but to hold fast their faith in Him, assuring them that, though He was to die and leave them, He was but going to the Father's many-mansioned house to prepare a place for them. But already they were troubled, for what could this death and departure mean but the destruction of all their hopes, of all their cherished plans? Jesus had drawn them away from their fishing-boats, their places of custom and daily employment, and inspired them with high personal and patriotic ambitions, and encouraged them to believe that He was the Seed of David, the promised Messiah; and they hoped that He would cast out Pilate and his hated Roman garrison, restore the kingdom to Israel, and sit on David's throne, a King, reigning in righteousness and undisputed power and majesty for ever. And then, were they not to be His Ministers of State and chief men in His Kingdom? He was their Leader, directing their labours; their Teacher, instructing their ignorance and solving their doubts and all their puzzling problems; their Defence, stilling the stormy sea and answering for them when questioned by wise and wily enemies. They were poor and unlearned and weak. In Him was all their help, and what would they do, what could they do, without Him? They were without social standing, without financial prestige, without learning or intellectual equipment, without political or military power. He was their All, and without Him they were as helpless as little children, as defenceless as lambs in the midst of wolves. How could their poor hearts be otherwise than troubled? But then He gave them a strange, wonderful, reassuring promise: He said, "If ye love Me, keep My commandments. And I will pray the Father, and He shall give you another Comforter, that He may abide with you for ever" (John xiv. 15, 16). I am going away, but Another shall come, who will fill My place. He shall not go away, but abide with you for ever, and He "shall be in you." And later He added: "It is expedient for you"--that is, better for you--"that I go away; for if I go not away, the Comforter will not come."