The answer comes from the key phrase "heads and hearts."
The head part is (believe it or not) in the faith in freedom. He is saying that Americans believe in freedom and they believe it is worth maintaining. The word faith here means more like trust rather than what you think of when you think of faith.
The emotional heart part comes from the same quotation. "It's faith in freedom under the Guidance of God." The emotional part is under the guidance of God. He is implying that we are connected to God and that is an emotional appeal (or it is to anyone who is religious).
This is one of those sticky questions that contain both emotion and reason. I think it leans more on the side of emotion. Don't, however, be surprised if you are wrong if you choose it.
