We praise or blame as one or the other affords more opportunity for exhibiting our power of judgement.
We must learn to love, learn to be kind, and this from the earliest youth; if education or chance give us no opportunity to practice these feelings, our soul becomes dry and unsuited even to understanding the tender inventions of loving people.
You gave him an opportunity of showing greatness of character and he did not seize it. He will never forgive you for that.
If we have injured someone, giving him the opportunity to make a joke about us is often enough to provide him personal satisfaction, or even to win his good will.