The 'height' of the ceiling is eight feet. [=the ceiling is eight feet above the floor; the ceiling is eight feet high]
It was 'the height of' stupidity to quit the team. [=it was extremely stupid to quit the team]
He was 'at the height of' his fame when he died. [=he died when he was most famous]
(..) and now you're just gonna let me inside of your head? Are you afraid of that? You're not? No. Fear of heights. I'm not surprised. It's not real. - We could just jump. - No. Divergent would jump. (..)2014 Divergent
(..) You Okay? Yeah. I'm fine. This is high enough. No, we need to go higher. You all right? You're afraid of heights. Everyone's afraid of something. I didn't think you were afraid of anything. Come on, Tris. Really? (..)2014 Divergent