Win through your Actions, Never through Argument
Any momentary triumph you think gained through argument is really a Pyrrhic victory: The resentment and ill will you stir up is stronger and lasts longer than any momentary change of opinion. It is much more powerful to get others to agree with you through your actions, without saying a word. Demonstrate, do not explicate.
These quotes from the 48 Laws of Power are really helping me with my character during such a trying time.