"So this is the result of trying to do something good." Gamora does know a bit of what that's like. She's never been in a state like the one he's in, but she has risked her life before. Recently, in fact, to save others. "If it was meant to kill you and it didn't, then you were stronger than it." That's what that means, right? He survived whatever the ordeal was.

"For your sake, you should try and heal quickly. We have no idea what this place is really like." A little smirk appears. "You could barely get into your own room." So yeah, getting better would be a good idea in case something more challenging than a door comes along.