In the following conversation I thought he gave instruction for testing the qualities that make a man's friendship worth winning.
“Tell me, Critobulus,” he said, “if we wanted a good friend, how should we start on the quest? Should we seek first for one who is no slave to eating and drinking, lust, sleep, idleness? For the thrall of these masters cannot do his duty by himself or his friend.”
“No, of course not.”
“Then you think we should avoid one who is subject to them?”
“I do, certainly.”