3) I also find it interesting that he says "all attendant circumstances, such as noble birth and education, merely conduce to persuasion; for it is probable that virtuous parents will have virtuous offspring and that a man will turn out as he has been brought up."

because the Bible seems to take this expectation into account and spends quite a bit of time emphasizing that Jesus is descended from the most legendary of kings and the most noble of mothers, and is then raised by the most virtuous patron and protector possible (St. Joseph).