Anger can be an expensive luxury.
Anger - Angry Quotes
Angry Men Make Themselves a Bed of Nettles.
Where there is no antagonist, you cannot quarrel.
Least said, soonest mended.
Anger is as a stone cast into a wasp’s nest.
There is no off switch on a tiger.
When angry, count ten, before you speak; if very angry, a hundred.
The anger of the prudent never shows.
When anger spreads through the breath, guard thy tongue from barking idly.
While not exactly disgruntled, he was far from feeling gruntled.