A melancholy air can never be the right thing; what you want is a bored air. If you are melancholy, it must be because you want something, there is something in which you have not succeeded.
It is shewing your inferiority. If you are bored, on the other hand, it is the person who has tried in vain to please you who is inferior.
Scarlet and Black (ed. Everyman's Library, 1991)