Life in the world is like a manuscript of writings that is still in rough draft. When a man wishes or desires to do so, he can add something or subtract from it, and make changes in the writings. But the life in the world to come is like documents written on clean scrolls and sealed with the royal seal, where no addition or deletion is possible. Therefore, so long as we are found in the midst of change, let us pay heed to ourselves; and while we have power over the manuscript of our life, which we have written by our own hand, let us strive earnestly to add to it by leading a good manner of life, and let us erase from it the failings of our former life.
St Isaac the Syrian, from Homily Sixty-Two