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]
(..) our fear right out there on our sleeves. - Wait a second. Donkeys don't have sleeves. - You know what I mean. You can't tell me you're afraid of heights. I'm just a little uncomfortable about being on a rickety bridge over a boiling lake of lava! . For emotional support, (..)2001 Shrek