The best revenge is massive success meaning. Nothing irritates someone who wants to see you fail more than your incredible success, this is a rebuke of their thoughts and opinions and proof that they were wrong. If you want revenge on someone who has discouraged you or put down yoru goals and ideals then the best way to do this is to become very successful. When this happens no words need to be stated, your success is all the validation that you need to show that you were right and they were wrong.
There are people who spend their entire lives trying to hold others back or put them down in order to feel superior, and you do not need these people in your life poisoning your thoughts and actions. Focus on achieving success and don't worry about the haters, they will disappear once you are successful.