The Ascetical Homilies of Saint Isaac the Syrian - Homily Two Part III

The impact of sloth on the soul is often neglected and its significance minimized. St. Isaac the Syrian warns that without harsh tribulations of the flesh it is difficult for the untrained youth to be held under the yoke of sanctification. We must be willing to take upon ourselves the cross of the pursuit of virtue before sharing in its glory. Whenever the soul becomes heedless of the labors of virtue, he is inevitably drawn to what is opposed to them and thus becomes deprived of God's help and so subject to alien spirits. Every man who before training in the afflications of the cross completely and pursues the sweetness and glory of the cross out of sloth and for its own sweetness, has wrath come upon him. He lacks the proper wedding garment - the healing of the infirmity of his thoughts by patient endurance of the labor that belongs to the shame of the cross. A man whose mind is polluted with the passions of dishonor and rushes to imagine with his mind and ascend to the divine vision, is put to silence by divine punishment. "And he was speechless. Then the king said to the attendants, ‘Bind him hand and foot and cast him into the outer darkness. In that place there will be weeping and gnashing of teeth.’"

Theoria is rooted in virtue and becomes the receptacle and house of the knowledge of God.  It is in the body that we must pursue virtue and so we must engage in the rigors of asceticism.  We are not angels but rather fallen human beings who must purify the eye of the heart for the perception of the divine mysteries.

St. Isaac then begins to clarify the understanding of the word world.  The world is collective noun applied to all the passions.  Great care must be given in separating oneself from the world and with humility we must understand that depeneding on our state we may not perceive all the passions that hold us in their grip.