John Chrysostom — as excerpted in the Catena Aurea on Luke 15:11-16

“(ut sup.) Now the Scripture says, that the father divided equally between his two sons his substance, that is, the knowledge of good and evil, which is a true and everlasting possession to the soul that uses it well. The substance of reason which flows from God to men at their earliest birth, is given equally to all who come into this world, but after the intercourse that follows, each one is found to possess more or less of the substance; since one believing that which he has received to be from his father, preserves it as his patrimony, another abuses it as something that may be wasted away, by the liberty of his own possession. But the freedom of will is shewn in that the father neither kept back the son who wished to depart, nor forced the other to go that desired to remain, lest he should seem rather the author of the evil that followed. But the youngest son went afar off, not by changing his place, but by turning aside his heart. Hence it follows, He took a journey into a far country.”