I always act like this. [For now, he won't relent. Not when Izuku is showing him some determination.] You're just gullible.

Haven't you ever heard the saying, "Keep your friends close and your enemies closer"? [It's frustrating to him that Izuku is actually taking the time to bother asking--not just deter him, not just fight him. Wanting to know how he's feeling.

He hates it because it's so pure.] In here, you're my enemy. Only one of us is going to crawl back out of this hole, and it's going to be me because your powers are a fraud. [Not that he would ever leave Izuku behind, even unconscious... but Izuku doesn't have to know that right now!!]

If you're a hero, start acting like one!