Destroy darkness within by familiarizing yourself with the face as much as possible. Mitigate the effects in ways you can, learn discipline and self-control. Do not avert your gaze. Do not downplay anything.
Destroy darkness without by extending forgiveness and redemption, but in the face of unrepentant evil, attack. And the attack must be planned. Useless anger from you is just humor to them. Stay calm and look for any opening. If there is nothing useful you can do, ignore.