"For in Him we live and move and have our being; as even some of your (own) poets have said, For we are also His offspring."
(Acts 17:28 AMP)
If someone is speaking out negative then they are living a negative life. You can't avoid a bird flying over your head but you can stop a bird from building a nest over your head. In life, you can't avoid people who are talking negatively about you. So why worry about them if its not in your control. You can control what goes on, in you.. God has a plan for our lives and the devil will do whatever he can to destroy that plan. The negativity that goes on is just the devil. Let the devil represent the bird. Don't let the bird build a nest on your head when you can just let him fly around you and ignore it.