Every professing Christian is the soldier of Christ. He is bound by his baptism to fight Christ’s battle against sin, the world, and the devil. The man that does not do this, breaks his vow: he is a spiritual defaulter; he does not fulfil the engagement made for him. The man that does not do this, is practically renouncing his Christianity. The very fact that he belongs to a Church, attends a Christian place of worship, and calls himself a Christian, is a public declaration that he desires to be reckoned a soldier of Jesus Christ.
Armour is provided for the professing Christian, if he will only use it. “Take unto you,” says Paul to the Ephesians, “the whole armour of God.” “Stand, having your loins girt about with truth, and having on the breast-plate of righteousness.” “Take the helmet of salvation, and the sword of the Spirit, which is the Word of God.” “Above all, take the shield of faith” (Ephes. vi. 13-17). And not least, the professing Christian has the best of leaders, —Jesus the Captain of salvation, through whom he may be more than conqueror; the best of provisions,—the bread and water of life; and the best of pay promised to him,—an eternal weight of glory. ( J.C Ryle)