For their entire lives, Christians are called to spiritual warfare. The goal in the conflict is to save as many as possible.
Reference: E.G. White, "The Upward Look," p. 71

Full text of the devotional: “Put on the Armor of Christ,” February 26

Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven. Matthew 5:16.

The light of truth must shine forth to the world. Those who love God and keep His commandments are called to aggressive warfare, not against one another, but against the armies of the invisible foe. There is to be no such thing as laying off the armor. At no time are those who claim to be Christ’s disciples to feel at ease in their church capacity, content to do nothing to rescue fallen human beings, and bring them back to their loyalty.

Heavenly angels are constantly ascending and descending between heaven and earth, engaged in unselfish service for the building up of the kingdom of Christ. Where are the men and women who will unite with these heavenly messengers? Where are those who will use their abilities in cooperation with divine power?

Think of what God has done for you. When you were perishing out of Christ, did not the warning message come to you, convincing you of sin and arousing you to repentance? Did not Christ reveal Himself to you as a sin-pardoning Saviour? And in the light and glory of your first love, were you not full of unselfish love to impart to others the grace which gave you newness of life in Christ?

Do not allow your zeal for Christ to decrease. Now that you have become the helping hand of Christ, you are to work earnestly for those whom, before your conversion, you looked upon with indifference. Remember that they are in as favorable a condition as you were... [when you were] brought to repentance, and that their salvation may be of higher value to the church than yours was. Grudge not earnest, tender words and kindly deeds. Draw those around you to the cross of Calvary. Be so greatly in love with the truth that you will daily receive fresh grace to impart. Open the windows of the soul heavenward, that the bright beams of the Sun of Righteousness may shine into your hearts. “Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven” (Matthew 5:16).

Truth, precious, essential truth, will open before all who will keep their souls in the love of God. Duty and sacrifice will be precious to them, because of their love for the purchase of the blood of Christ. Human beings upon whom they would once scarcely look now assume a preciousness in their eyes. Once they had no interest in them; now they are united with Christ, and they are bound up in love with His heritage. The heart once frozen by icy selfishness is now melted by the influence of the Spirit.—Manuscript 17, February 26, 1901, “Neglected Duties.”