MACDUFF: I am not treacherous.
MALCOLM: But Macbeth is. Even a good and virtuous man might bend under a royal command.
But I beg your pardon. I cannot make you evil simply by imagining you are so. Angels remain bright even though Lucifer, the brightest angel, fell from heaven. Even if evil goes disguised as righteousness, the righteous cannot change the way they appear.
MACDUFF: I have lost my hope of convincing you to fight Macbeth.
MALCOLM: You have lost your hopes of me, but I have found my doubts about you. Why did you abandon your wife and children—the most precious things in your life, which should hold you with bonds of love? How could you leave them so abruptly? I beg you, don't interpret my suspicions as slander. You must understand that, as Duncan's son, I need to protect myself. You may very well be honest, despite what I think.