Before The Time of Christ, the cross was an instrument of punishment; it evoked fear and aversion. But after Christ’s death on the Cross it became the instrument and sign of our salvation. Through the Cross, Christ destroyed the devil; from the Cross He descended into hades and, having liberated those languishing there, led them into the Kingdom of Heaven. The sign of the Cross is terrifying to demons and, as the sign of Christ, it is honored by Christians. The Lord manifested it in the sky to the Emperor Constantine as he was going to Rome to fight the tyrant who had seized power, and the Emperor, having fashioned a standard in the form of a cross, won a total victory. Having been aided by the Cross of the Lord, the Emperor Constantine asked his mother, the Empress Helen, to find the actual Life-giving Cross, and the devout Helen went to Jerusalem where, after much searching, she found it.
Many healings and other miracles were wrought and continue to be wrought by the Life-giving Cross and also by its depiction. Through it the Lord preserves His people from all enemies visible and invisible. The Orthodox Church solemnly celebrates the finding of the Cross of the Lord, recalling at the same time the appearance of the Cross in the sky to the Emperor Constantine. On that and other days dedicated to the Holy Cross, we beseech God that He grant His mercies not only to individual people, but to all Christendom, to the whole Church. This is well expressed by the Troparion to the Cross of the Lord, composed in the eighth century, when Saint Cosmas, Bishop of Maiuma, a friend of St. John Damascene, wrote the service to the Exaltation of the Cross of the Lord.
“Save, O Lord, Thy people, and bless Thine inheritance, granting victory to (right-believing) kings over adversaries, and by Thy Cross preserving Thy community.”
The beginning of this prayer is taken from the twenty-seventh Psalm. In the Old Testament the word “people” designated only those who confessed the true faith, people faithful to God. “Inheritance” referred to everything which properly belonged to God, God’s property, which in the New Testament is the Church of Christ. In praying for the salvation of God’s people (the Christians), both from eternal torments and from earthly calamities, we beseech the Lord to bless, to send down grace, His good gifts upon the whole Church as well, and inwardly strengthen her.
The petition for granting “victory to kings,” i.e., to the bearers of supreme authority, has its basis in Psalm 143, verse 10, and recalls the victories King David achieved by God’s power, and likewise the victories granted Emperor Constantine through the Cross of the Lord. This appearance of the Cross made emperors who had formerly persecuted Christians into defenders of the Church from her external enemies, into “external bishops,” to use the expression of the holy Emperor Constantine.
The Church, inwardly strong by God’s grace and protected outwardly, is, for Orthodox Christians, “the city of God,” God’s community, His commonwealth, where the path to the Heavenly Jerusalem has its beginning. Various calamities have shaken the world, entire peoples have disappeared, cities and states have perished, but the Church, in spite of persecutions and even internal conflicts, stands invincible; for the gates of hell shall not prevail against her (Matt. 16:18). Today, when world leaders try in vain to establish order on earth, the only dependable instrument of peace is that about which the Church sings:
The Cross is the guardian of the whole world; the Cross is the beauty of the Church, the Cross is the might of kings; the Cross is the confirmation of the faithful, the Cross is the glory of angels and the wounding of demons. (Exapostilarion of the Exaltation of the Cross)