M. Tullius Cicero Pro A. Cluentio 17

[17]
  You have heard what was the origin of the bad feeling between him and his mother; when you know the rest, you will perceive that I feared this with reference to our care; for, I am not ignorant that, whatever sort of woman a mother may be, still in a trial in which her son is concerned, it is scarcely fitting that any mention should be made of the infamy of his mother. I should not, O judges, be fit to con duct any cause, if, when I was employed in warding off danger from a friend, I were to fail to see this which is implanted and deeply rooted in the common feelings of all men, and in their very nature. I am quite aware, that it is right for men not only to be silent about the injuries which they suffer from their parents, but even to bear them with equanimity; but I think that those things which can be borne ought to be borne, that those things which can be buried in silence ought to be buried in silence.