This quote by George Herbert suggests that the best method to get back at somebody who has actually wronged you is to live a good life. It suggests that rather of seeking vengeance, one should concentrate on enhancing their own life and wellbeing. This might imply looking after oneself, setting objectives, and aiming to be the best version of oneself. It might likewise imply respecting others, helping those in requirement, and living a life of stability. Living well is a type of revenge since it reveals that you are not affected by the wrongs done to you which you can rising above it. It is a method of revealing that you are strong and resistant, and that you are not letting the wrongs done to you define you.
"Don't lower your expectations to meet your performance. Raise your level of performance to meet your expectations. Expect the best of yourself, and then do what is necessary to make it a reality"