On The Estate of Aristarchus (21-22)

But the time has now come when it is only right that my opponent should declare who it was that gave him the estate, and what laws justify his introduction in the ward, and why it is that my mother was not heiress to this fortune. These are the points on which you must give your verdict, not as to whether we are late in demanding what is our own. If they cannot explain these points, you would be justified in deciding that the estate is mine.

I am sure they will not be able to do so; for it is difficult to argue against law and justice. But they will talk about the deceased, saying how sad it is that so brave a man has fallen in battle and declaring that it is unjust to set aside his will. I myself, gentlemen, am of opinion that any will which a man may make about his own property ought to be valid, but that wills which concern other people's property ought not to have the same validity as those in which a man disposes of what is his own. Now this property is clearly not theirs but ours;