I have often stood as a boy on the streets of old Philadelphia, and watched a gang of foreign laborers at work. As a rule they could speak only the language of their own fatherland. There would be a gang-boss to direct their movements. Perhaps it was a huge stone to be moved, or a piece of structural iron, or a heavy rail to be torn up. The ends of their crowbars were fitted under the thing to be moved. Then they waited a moment for the gang-boss to give the word. He would say, "heave ho!" Then all together they would sing "heave ho," and push. And a "heave ho," and push; a "heave ho," and a push. They made perfect music. There was always a small crowd gathered, watching and enjoying the simple music. Their work was easier because done rhythmically. This, of course, is the simple philosophy that provides music for soldiers on march. The men can walk much longer, and farther, with less fatigue if they go to the sound of music. The story is told of the contracts for some bridge-building in the Soudan being carried off by American bidders. Their competitors in the bidding specified a year's time or so, for the work. The Americans agreed to do it in three months. They were awarded the contract, and to the others' surprise had the work completed within the specified time. One of the contractors who had bid for the job on the basis of a year's time said afterwards to the successful contractor, "I wish, if you wouldn't mind doing so, you would tell me how you ever got that work done in so short a time with those undisciplined Soudanese natives for workmen. I have had them on other contracts and I know I couldn't have done it. How did you ever do it?" And the American, whose blood was British a generation or two back, and farther back yet Teutonic, smiled as he quietly said, "We had a band of native musicians playing the liveliest music they knew within earshot of every gang of laborers, while our gang-bosses kept them steadily at work." Rhythm is the secret of power. Full rhythm is possible only where there is full obedience to nature. The man in full sweet harmony with God in all of his life knows the stilling ecstasy of peace, and the marvelous outgoings of real power. You shall find within your heart the great stilling calm of God, as steadying as the rock of ages, as exhilarating as the subtle fragrance of flowers, and as restful as a mother's bosom to her babe. He is Our Peace. But there is something here finer yet by far than this. Everything God provides for us is personal. There is always the personal touch and presence. Do you remember that during the earlier days of the recent war with Spain this occurrence frequently took place? In the Caribbean waters a Spanish merchantman would be overtaken by an American warship. A few shots were sent over the bows of the merchantman with a demand for surrender. And then the Spanish flag was seen to drop from the merchantman's masthead in token of surrender.