Do you have a favorite quote that you return to again and again? If so, what is it, and why does it move you?
I don't do well with quotes because I can't remember the quote verbatim or the person to whom the quote should be attributed to so therefore I stay far away from using quotes to pepper my conversations or my writings.
I remember sayings such as "to err is human, to forgive divine" or "Fool me once; shame on you. Fool me twice; shame on me" but I don't go about my day using them to make a point, I try to use my own words to drive my point across.
However I do admire those who can keep all those words and authors together intact in their memory banks. I think that my admiration is not so much the flair for using quotes in and of itself but in the ability to take a famous person's words to further strengthen your own argument; thereby using the weight of history and prior experience, even if it's not your own, to argue your point. It is an intelligent way of debating and winning your side of the argument or further justifying your position.
I have to rely on my own arguments because there is nothing that weakens an argument more than when you misquote someone or misapply a quote and the opposing party calls you out on it. You are then left only with your own arguments upon which you must then acquit yourself of trying to argue a position based false presumptions. It is really not worth it so that is why I don't quote anyone.