Ambrose of Milan : Let us now consider who are the shepherds, and what living creatures they shepherd and what was the nature of the dispute between the shepherds of Abraham and those of Lot. Shepherds are those who govern the flocks. They are diligent and wise when they do not allow their animals to trample the farmlands with their feet or to damage the crops with their teeth. [They are] negligent and lazy when they do not invite their cattle to pasture on grassy fields rather than in planted areas but allow them to wander freely through the various garden crops. These shepherds then should be watchfully attentive so that what has happened through the carelessness of the negligent be not attributed to the diligent.But since we are here not speaking of visible things, let us first of all consider what kind of animal they have to shepherd. We can supply a definition of these shepherds: "they are shepherds of cattle," says the text. Now cattle, as we have said, signify the irrational senses of the body. Who then are the shepherds of the senses, if not their masters and, in a certain sense, their rulers and guides, that is to say, the monitors of a certain way of speaking or the thoughts of our mind? If these are expert and constant in the pastoral exercise, they do not permit the flock of the senses to wander off and to stop to graze in useless or positively harmful pastures, but with wise leadership they call them back and apply the brakes of reason to block their activity when they rebel. But the bad leaders or useless disputes allow the cattle to be carried away by their own impulsiveness, to run toward the precipice, to trample on planted fields and to feed on their produce, so much so that if at present there are still fruits of virtue to be found, they destroy even these. — On Abraham John Chrysostom : Notice how the abundance of their possessions proved to be a major cause for their separation, creating a division, sundering their harmony and undoing the bond of kinship. "Trouble developed between Abram's herdsmen and Lot's herdsmen. Now the Canaanites and the Pherezites inhabited the land at that time." Notice how the relatives are responsible for the first signs of separation. Invariably this is the source from which springs all sorts of problems—discord among the brethren. The text says, remember, "Trouble developed between the herdsmen." They are the ones who provide the occasion for separation, who sunder the harmony, who give evidence of bad feeling. — HOMILIES ON Genesis 33.6