The ominous black flag of ISIS has a long and evil history. According to Islamic tradition, the prophet Muhammad used a black banner; and through the ages, Islamic clerics have heralded the coming apocalyptic caliphate using the symbol of black banners. In the 1990s, Al-Qaeda adopted a black banner, and the global jihadist movement embraced it in the early 2000s.
How different the cause of Christ! In Exodus 17:15, Moses built an altar and called its name “The-Lord-Is-My-Banner.” Isaiah predicted, “In that day there shall be a Root of Jesse, Who shall stand as a banner to the people; for the Gentiles shall seek Him” (Isaiah 11:10). Psalm 60:4 says, “You have given a banner to those who fear You, that it may be displayed because of the truth.” And Psalm 20:5 says, “We will rejoice in your salvation, and in the name of our God we will set up our banners!”
God’s banner over us is love, and when we go into the world we’re flying the flag of the Cross—God’s symbol of love. People know Who we belong to by the way we love others—our family, friends, and enemies alike. The color of our flag is LOVE.
All virtue that is saving, or distinguishing of true Christians, is summed up in Christian love.
R. C. Sproul