Any military metaphor which is used to-day will surely have a very arresting significance. Many of our hymns are crowded with military terminology. In the Wesleyan Methodist Hymn-Book there is a whole section entitled "For Believers Fighting." We are all familiar with these martial hymns: "Onward, Christian Soldiers", "The Son of God goes forth to war", "Soldiers of Christ arise", "Stand up, stand up, for Jesus, ye soldiers of the cross", "Oft in danger, oft in woe, onward Christians, onward go." But too often the soldier-like hymn is only a bit of martial poetry which pleases the emotions but does not stir the will. We like the swing of the theme. It brings a sort of exhilaration into our moods, just as lively dance music awakes a nimble restlessness in our feet. Too often it is the song of the parade ground, and it is not broken with the awful thundering of the guns in actual war. But just now when we hear the phrase, "Endure hardness as a good soldier," our thoughts are carried away to the battlefields of Europe. We recall those roads like deeply ploughed fields! Those fields scooped by the shells into graves in which you can bury a score of men! Those trenches filling with the rain or snows, the hiding place of disease, and assailed continually with the most frightful engines of destruction! Pestilence on the prowl! Frost stiffening the limbs into benumbment! Death always possible before the next breath! These military metaphors in our hymns get some red blood into them when we use them against backgrounds and scenes like these. "Endure hardness as a good soldier." Now the apostle calls for this soldierly spirit in Thessalonica. He is writing to young recruits in the army of the Lord. They are having their first baptism of fire. Their enemies are strong, subtle, ubiquitous. To be a Christian in Thessalonica was to face the fierce onslaught of overwhelming odds. But indeed in those early days, Christian believers, wherever they lived, had to be heroic in the defence of their faith and obedience. Everywhere circumstances were hostile. Nothing was won without sacrifice. Nothing was held without blood. To be a witness was to be a martyr. If a believer would be faithful to his Lord he must "fight the good fight of faith"; if he would extend the frontiers of the Kingdom of Heaven he must endure hardness as a good soldier of Jesus Christ.