With the increase of wealth the mania of covetousness increases. - John Cassian

Wherefore a monk's whole attention should thus be fixed on one point, and the rise and circle of all his thoughts be vigorously restricted to it; viz., to the recollection of God, as when a man, who is anxious to raise on high a vault of a round arch, must constantly draw a line round from its exact centre, and in accordance with the sure standard it gives discover by the laws of building all the evenness and roundness required....

This will be the case when every love, every desire, every effort, every undertaking, every thought of ours, everything that we live, that we speak, that we breathe, will be God, and when that unity which the Father now has with the Son and which the Son has with the Father will be carried over into our understanding and our mind, so that, just as he loves us with a sincere and pure and indissoluble love, we too may be joined to him with a perpetual and inseparable love and so united with him that whatever we breathe, whatever we understand, whatever we speak, may be God.
In him we shall attain, I say, to that end of which we spoke before, which the Lord longed to be fulfilled in us when he prayed: ‘That all may be one as we are one, I in them and you in me, that they themselves may also be made perfect in unity.’ (John 17:22-23)

Sometimes when we have been overcome by pride or impatience, and we want to improve our rough and bearish manners, we complain that we require solitude, as if we should find the virtue of patience there where nobody provokes us: and we apologize for our carelessness, and say that the reason of our disturbance does not spring from our own impatience, but from the fault of our brethren. And while we lay the blame of our fault on others, we shall never be able to reach the goal of patience and perfection. The chief part then of our improvement and peace of mind must not be made to depend on another's will, which cannot possibly be subject to our authority, but it lies rather in our own control. And so the fact that we are not angry ought not to result from another's perfection, but from our own virtue, which is acquired, not by somebody else's patience, but by our own long-suffering.