and those who matter don't mind. Dr. Seuss because those who mind don't matter because those who mind don't matter Be who you are and say what you feel because those who mind don't matter Be who you are and say what you feel Be who you are and say what you feel and those who matter don't mind. and those who matter don't mind. Be who you are and say what you feel because those who mind don't matter and those who matter don't mind.