I found this quote while I was our ward (local church congregation) choir director and LOVED it, thought I'd share:
""And I say that the singing of the songs of Zion, though imperfectly, with the inspiration of God, will touch the hearts of the honest more effectiviely than if sung well without the Spirit of God. Sing with the Spirit of God. Love the words taht you sing."
I love this because it is so true, I have seen it in my life. Really, it goes with anything, if you teach or sing with the Spirit, you will touch more hearts than without the Spirit- no matter how perfectly it is done.