The Orthodox Church honors the Cross as a great relic symbolizing the redemption of the human race. The honorable Cross of the Lord for the Christian faith is the highest symbol of sacrifice and sanctification, and therefore its significance is truly invaluable. The Cross and the Resurrection are the two main axes of Christianity: The Resurrection follows the Cross and implies the Cross, and the Cross predicts the Resurrection.
The honorable Cross of the Lord is the unifying force of mankind. The two crossbars of the Cross symbolize the union of men with God (the vertical crossbar) and the union of men with one another (the horizontal crossbar). The last one also symbolizes the two arms of the Crucified Savior, which are open to embrace all mankind.