How we cite our quotes:
"I want you to be aware that I know you have treated me infernally – infernally! Do you hear? And if you flatter yourself that I don't perceive it, you are a fool; and if you think I can be consoled by sweet words, you are an idiot." (11.49)
Though he knows he has been cruelly treated, Heathcliff cannot help but love Catherine. As readers we have waited for the moment that Heathcliff gets in Catherine's face about her behavior.
"She abandoned [her home] under a delusion," he answered, "picturing in me a hero of romance, and expecting unlimited indulgences from my chivalrous devotion." (14.35)
Like many others in the story, Isabella is influenced by all the novels she reads. She has certainly changed her opinion of Heathcliff from when they were children.
"You teach me now how cruel you've been – cruel and false. Why did you despise me? Why did you betray your own heart, Cathy? I have not one word of comfort. You deserve this. You have killed yourself. Yes, you may kiss me, and cry; and wring out my kisses and tears: they'll blight you – they'll damn you. You loved me – then what right had you to leave me? What right – answer me – for the poor fancy you felt for Linton? Because misery and degradation, and death, and nothing that God or Satan could inflict would have parted us, you, of your own will, did it. I have not broken your heart – you have broken it; and in breaking it, you have broken mine. So much the worse for me that I am strong. Do I want to live? What kind of living will it be when you – oh, God! would you like to live with your soul in the grave?" (15.37)
In other words, you have no one to blame but yourself. But Catherine never really sees it that way. And though she continues to love Heathcliff, running away with him is never an option – nor does he ask her to. Why?