It doesn’t matter what they say about you as long as it isn’t true. (www.streamingfaith.com)
If people are saying you’ve done wrong, you’ve lied, or have otherwise questioned your integrity, yes, this statement is good. If the evil things said about you aren’t true, don’t think you have to prove yourself. On the other hand, when good things are reported about you, be sure that they are true. Let your words and deeds always be forthright, honest, and gracious.
Now, who will want to harm you if you are eager to do good? But even if you suffer for doing what is right, God will reward you for it. So don’t worry or be afraid of their threats. (1 Peter 3:13-14)