As it is, he's holding on to logic and reason as a support, keeping it in place lest his own feelings (and thus powers) get of control, as they've already threatened once.

"I'm sorry." The words are simple, and yet still foreign. Until this, he has had few reasons to apologize, or has had to acknowledge being in the wrong. Something that on Krypton, was often used as a mark against him- a sign of ego, or a lack of shame.

"What I said and did were things I would never ordinarily do, under any circumstance. I have never wanted to harm you, in any way."