Thomas S. Monson said this quote

The philosophies of men surround us. The face of sin today often wears the mask of tolerance. Do not be deceived; behind that facade is heartache, unhappiness, and pain. You know what is right and what is wrong, and no disguise, however appealing, can change that. Be the one to make a stand for right, even if you stand alone. Have the moral courage to be a light for others to follow.