In fact, eloquence in English will inevitably make use of the Latin element in our vocabulary.
I had no doubts I could go to the pole. I may not be as strong, but I make up for physical strength in other areas, like steadiness and not panicking under stress.
Culture means, I think, that you have widened your experience enough through reading and through being a little bit thoughtful about these things that it has changed your outlook in some ways. And not necessarily made you a better human being but made you see things.