You can be "above" something psychologically as well as physically. Usually this is meant in the sense of morality, such as "i am certainly above cheating on a test".
Likewise, we say that someone "stoops" or "descends" when they do something morally wrong. For example, you find out your friend has been trying to sweet talk your girlfriend, and even sent her a Valentine's card. You say, "i can't believe you would stoop to this!"
'He is not so mighty yet that he has no fear' I'm afriad that it doesn't make sense, does it? I think if he is so mighty, then he might have no fear, but it writes hs is NOT so mighty. That's why I am confused. Do you understand my point? I mean, if 'not' is deleted in the sentence, then the sentence would make sense to me. 'He is so mighty yet that he is above fear' What do you think?
Thank you, bunyip, I wonder if the phrase 'be above fear' also can mean 'not a terror' or 'not scary'? Because with that meaning, the sentence can make sense. Or do you agree with me guessing that the movie scriptwriter would have made a mistake putting an wrong phrase? The line is from Gandalf in The Lord of the Rings: The Two Towers, 2002 film by the way.