Never do a single thing in the anticipation to prove something to someone who has hurt you. If someone has hurt or offended you (whoever that person may be), never perform anything or strive for anything in your life with the mind of proving something to that someone/ to those people. May nothing that you do be done with any thought of them in mind. There is nothing that needs to be proven.
To please God… to be a real ingredient in the divine happiness… to be loved by God, not merely pitied, but delighted in as an artist delights in his work or a father in a son- it seems impossible, a weight or burden of glory which our thoughts can hardly sustain. But so it is.