A great article about the history of the Church in peril, as she is now, from Fr. Rutler, at New Advent.
The Transfiguration is celebrated on the sixth of August, but an account of it is also proclaimed as the liturgical Gospel in Lent, because it was a way that the Lord prepared Peter, James and John for the Crucifixion. These were the same apostles who would be with the Lord as he sweat blood the night before his death. Immediately after Christ’s transfiguration, he would cure an epileptic suffering a violent seizure at the foot of the mountain: glory and agony within a few hours.
The unearthly light that shone from Christ on the mountaintop strengthened the apostles for when they would watch the sky grow dark on Good Friday. Even so, the apostles still would not fully understand why Christ had to die: when our Lord told them that he must go to Jerusalem and “be lifted up,” Peter said he would not allow it. What the Fisherman meant as a brave act of love, Jesus said was the work of the Evil One using Peter: “Get behind me, Satan.”
Satan uses people in attempts to block God’s plan, fooling and flattering them to use their power and talent to obscure the radiance of God. Sometimes he does this through individuals, and other times through political movements and false religions. One vivid example was the Siege of Belgrade in 1456.
Following the fall of Constantinople to the Muslims and the desecration of the world’s largest church, Hagia Sophia (“Holy Wisdom”), the Ottoman Turks had worked their way into Europe, hoping to conquer Rome. Pope Callixtus III saw the Devil’s work here, and summoned the brilliant Franciscan, Saint John of Capistrano, seventy years old, to crusade against the foe. At a meeting in Frankfurt, the friar found the Germans and Austrians too indifferent to take up arms, so he enlisted the Hungarian general, John Hunyadi, and both of them, riding into battle against great odds, lifted the siege of Belgrade and delayed Muslim progress into Europe by about 60 years.
Hunyadi brandished a sword and Capistrano a more powerful crucifix. These great crusaders died shortly after from contagion. The Pope had ordered church bells to be rung at noon before the start of the conflict. News of victory reached Rome on the Feast of the Transfiguration, so the Holy Father made it a universal feast. Moreover, he ordered that church bells be rung at every noonday.
In 1956, Pope Pius XII evoked the “Turkish Bell” as a summons to a crusade of prayer for oppressed Christians in Communist East Europe and China.
Retrieved March 2, 2015 from http://blog.newadvent.org/2015/03/the-terror-that-stalks-our-world-now-is.html