He is a mighty man.
(Sorry for the stupid question…)
Could you say, what is (to you) the first sense of the expression? (When it is used actually seriously, with full respect and not to compare a person with a comical superman :)).
He is… Strong physically? Brave? Powerful (influential)? …?
Or it depends mainly on the context and has to be specified clearly like this:
now he was a mighty man of wealth (bnc)