Joseph Parker declared that great lives are built on great promises, and so they are. These men had so far humbled themselves that they found God. They got close to Him, and He spoke to them. He gave them promises. He revealed His way and truth to them, and trusting Him, believing His promises, and fashioning their lives according to His truth--His doctrine--everything else followed. They became "workers together with God," heroes of faith, leaders of men, builders of empire, teachers of the race, and, in an important sense, saviours of mankind. Their secret is an open one; it is the secret of every truly successful spiritual leader from then till now, and there is no other way to success in spiritual leadership. 1. They had an _experience_. They _knew God_. 2. This experience, this acquaintance with God, was _maintained_ and deepened and broadened in obedience to God's teaching, or truth, or doctrine. 3. They patiently yet urgently _taught others_ what they themselves had learned, and declared, so far as they saw it, the whole counsel of God. They were abreast of the deepest experiences and fullest revelations God had yet made to men. They were leaders, not laggards. They were not in the rear of the procession of God's warriors and saints; they were in the forefront. Here we discover the importance of the doctrine and experience of holiness through the baptism of the Holy Spirit to Salvation Army leaders. We are to know God and glorify Him and reveal Him to men. We are to finish the work of Jesus, and "fill up that which is behind of the sufferings of Christ" (Col. i. 24). We are to rescue the slaves of sin, to make a people, to fashion them into a holy nation, and inspire and lead them forth to save the world. How can we do this? Only by being in the forefront of God's spiritual hosts; not in name and in titles only, but in reality; by being in glad possession of the deepest experiences God gives, and the fullest revelations He makes to men. The astonishing military and naval successes of the Japanese are said to be due to their profound study, clear understanding, and firm grasp of the theory, the principles, the doctrines of war; their careful and minute preparation of every detail of their campaigns; the scientific accuracy and precision with which they carry out all their plans, and their splendid and utter personal devotion to their cause. Our war is far more complex and desperate than theirs, and its issues are infinitely more far-reaching, and we must equip ourselves for it; and nothing is so vital to our cause as a mastery of the doctrine and an assured and joyous possession of the Pentecostal experience of holiness through the indwelling Spirit. I. _The Doctrine._--What is the teaching of God's word about holiness?