Honestly, I don't have a lot of favorite quotes.
Two Mark Twain Gems
Better to remain silent and be thought a fool than to speak out and remove all doubt.
Good breeding consists in concealing how much we think of ourselves and how little we think of the other person.
And if it seem evil unto you to serve the LORD, choose you this day whom ye will serve; whether the gods which your fathers served that were on the other side of the flood, or the gods of the Amorites, in whose land ye dwell: but as for me and my house, we will serve the LORD.
Joshua 24:15 (King James Version)