This is difficult. I've forgotten most of the quotes I knew from famous people.
I love this one, by C.S. Lewis...
A man can no more diminish God's glory by refusing to worship Him than a lunatic can put out the sun by scribbling the word 'darkness' on the walls of his cell.
As for lyrics, there's a song by the 10,000 Maniacs that I count as the most beautiful lyrics ever penned. I love them, because they make me think and re-evaluate who and why I am. Also, I feel that they reference God more than Natalie Merchant might have intended when she wrote them.
we are the roses in the garden
beauty with thorns among our leaves
to pick a rose you ask your hands to bleed
but what is the reason for having roses
when your blood is shed carelessly?
it must be for something more than vanity
believe me, the truth is we're not honest
not the people that we dream
we're not as close as we could be
I also adore this verse from the Bible, simply because of the controversial question it poses:
(Now Moses was a very humble man, more humble than anyone else on the face of the earth.)
As Christians, we believe that Moses wrote the entire Pentateuch. If we say that any of it was edited, we undermine our entire faith (if one thing was changed in the Bible, then the part about Jesus dying and coming back to life would be up for debate). So... how can you write that you are the most humble person on earth? It's impossible.
Think on that, friends. ;)