On the Life of the Wise Man made perfect by Instruction or, on the Unwritten Law, that is to say, on Abraham (61-65)

for if any one observes the arrangement which exists in nature, and the constitution according to which the world goes on, which is more excellent than any kind of reasoning, he learns, even though no one speaks to him, to study a course of life consistent with law and peace, looking to the example of good men. But the most manifest demonstrations of peace are those which the scriptures contain; and we must mention the first which also occurs the first in the order in which they are set down.

He being impressed by an oracle by which he was commanded to leave his country, and his kindred, and his father’s house, and to emigrate like a man returning from a foreign land to his own country, and not like one who was about to set out from his own land to settle in a foreign district, hastened eagerly on, thinking to do with promptness what he was commanded to do was equivalent to perfecting the matter.

And we have witnesses of this in the lawgivers who have enacted the second punishment next to death, namely, banishment, against those who are convicted of the most atrocious crimes: a punishment which indeed is not second to any, as it appears to me, if truth be the judge, but which is, in fact, much more grievous than death, since death is the end of all misfortunes, but banishment is not the end but the beginning of new calamities, inflicting instead of our death unaccompanied by pain ten thousand deaths with acute sensation.

Some men also, being engaged in traffic, do out of desire for gain sail over the sea, or being employed in some embassy, or being led by a desire to see the sights of foreign countries, or by a love for instruction, having various motives which attract them outwards and prevent their remaining where they are,