One third-century image of the Cross worth considering from the literature surrounding the Cult of the Cross (previous posts here) is that of the Cross as a tree that brings life to the world. Pseudo-Hippolytus proclaims in Paschal Homily 51:
This tree is my everlasting salvation. It is my food, a shared banquet. Its roots and the spread of its branches are my own roots and extension. In its shade, as in a breeze, I luxuriate and am cared for. Its shade I take for my resting place; in my flight from oppressive heat it is a source of refreshing dew for me. Its blossoms are my own, my utter delight its fruits, saved from the beginning for my harvest. Food for my hunger and well-spring for my thirst, it is also a covering for my nakedness, with the spirit of life as its leaves. Far from me henceforth the fig leaves! Fearful of God, I find it a place of safety; when unsteady, a source of stability. In the face of a struggle, I look to it as a prize; in victory, my trophy. It is the narrow path, the restricted road. It is Jacob’s ladder, the passage of angels, at whose summit the Lord is affixed. This tree, the plant of immortality, rears from earth to reach as high as heaven, fixing the Lord between heaven and earth. It is the foundation and stabilizer of the universe, undergirding the world that we inhabit. It is the binding force of the world and holds together all the varieties that human life encompasses. It is riveted into a unity by the invisible bonds of the Spirit, so that its connection with God can never be severed. Brushing heaven with its uppermost branches, it remains fixed in the earth and, between the two points, its huge hands completely enfold the stirring of the air. As a single whole it penetrates all things and all places. (Trans. Boniface Ramsey, Beginning to Read the Fathers, p. 81)
Those looking for a Great Apostasy or papist idolatry need look no further. Those, however, with a discerning mind, will see here the cross being a symbol for Christ, for his atoning work achieved for us on the tree. What our foe intended for our ruin, an instrument of shameful death and destruction, has become for us the very source of life. Because of Christ’s sacrifice on the Cross 2000(ish) years ago, we can taste true life now and live forevermore after the Resurrection.
This is the message of the Cross, the point of the image of the Cross as the tree of life.
For those looking for other beautiful images of the Cross, check out the Dream of the Rood.