Mood has to be controlled.
Otherwise, it's your master.

While humans play God, dogs learn from their masters.

Nobody is masterless,
even ronin enslaved by his sword.

If you're in bad mood, take a deep breath.
If you're in good mood, give thanks to God.

Smartass Student : 'a man must have his own master.'
Master of Stupidity: 'yea, everyone's somebody's bitch.

When you're in bad mood,
you find jerk on anywhere.