[By the way, I am adept at both sides of this game, so I'm really describing myself all along ...]
Be calm in arguing: for fiercenesse makes
Errour a fault, and truth discourtesie.
Why should I feel another man’s mistakes
More, then his sicknesses or povertie?
In love I should: but anger is not love,
Nor wisdome neither: therefore gently move.