I'm still working on that English paper I was on about in another post,
however now I'm getting more into the mechanics of it.

The following is what I have written for a single part:

     During the epic poem there are examples of the 'Concept of a Hero': loyalty, devotion, fortitude, the wandering hero, or a figure that is 'larger then life', the Greek ideal of a strong mind and body.

What I'm wondering is if, 'Concept of a Hero', and, 'larger then life' need to be put in quotations or single quotes. Or maybe not quotes at all?
The 'Concept of a Hero', and 'larger then life' are both things taught during class, hence why I feel the need for them to be quoted...but that doesn't mean its correct.

Any help would be apperciated greatly! Thank you:]

P.s.
I'll probably be sitting here until I get an answer:[
So, any help ASAP would be awesome:]!