“It is our duty to concentrate all our influence to make popular that which is sound and good, and unpopular that which is unsound.”

~Joseph smith

What this quote means is that you have to make everything that sounds bad and make it bad. And everything that sounds good make it good. Always do something that is good never do something that is bad. Never lie because it will make you seem like a bad person. If you tell the truth people will have more trust in you. So for example if someone needs you to take care of something valuable they would trust you. Always have something good to say about you not something bad.