De Virtutibus

for every bad man is destitute of a house, and destitute of a city, having been driven from his proper country, namely, virtue; which is the real, genuine country of all wise men: and ignobleness does of necessity attach itself to such a man, even though he be descended from grandfathers and great grandfathers whose lives were wholly irreproachable, since he studies to alienate himself from them and detaches himself from and removes to the greatest possible distance from real nobility in all his words and actions.

But moreover, besides that wicked men cannot possibly be noble, I also see that they are all of them irreconcileable enemies to nobility, inasmuch as they have destroyed the reputation which accrued to them from their ancestors, and have dimmed and extinguished all the brilliancy which did exist in their race.

And it is for this reason, as it appears to me, that some most affectionate fathers disown and disinherit their sons, cutting them off from their homes and from their kindred, when the wickedness which is displayed in them has over-mastered the exceeding and all-pervading love which is implanted by nature in parents.