As I understand it, your idea is that the user will discover some new interesting quotes and then the community can vote them up.

I like the idea, but in a general sense, quote is something shorter (usually just one sentence), and aiming at some basic "truths", like there are quotes about love, relationships, inspiration, etc. But if you mix that with quotes that require some specific knowledge, I am not sure if that will work.

For example, I tried to read some quote form your side, only discovering that it is related to U.S. politics. But I don't watch this topic closely, so after reading the paragraph, I just didn't understand what is it about. So the quotes which requires some specific knowledge (like politics of certain country, etc.), will need to have their own subdomain...if you mix it into one place, you will just get a snippets of text understood by only certain people.