"I am no less in blood than thou art, Edmund; if more, the more th'hast wrong'd me"- Edgar is saying that he is no less noble than Edmund and if he is, then that makes Edmund's betrayal even worse. Edgar, despite all this betryal, is still respectful of Edmund and views him still as a noble man, acting as a bastion for good and forgiveness in direct opposition to Edmund' machiavellianism
