1 I had many genuine and true friends, men who understood the laws of friendship, and faithfully observed them; but out of this large number there was one who excelled all the rest in his attachment to me, striving to outstrip them as much as they themselves outstripped ordinary acquaintance. He was one of those who were constantly at my side; for we were engaged in the same studies, and employed the same teachers. We had the same eagerness and zeal about the studies at which we worked, and a passionate desire produced by the same circumstances was equally strong in both of us. For not only when we were attending school, but after we had left it, when it became necessary to consider what course of life it would be best for us to adopt, we found ourselves to be of the same mind.
Source: On the Priesthood (New Advent)