hmmm yes it is true.

Anger becomes a problem when it harms you or others. If you have a hot temper, you may feel like it's out of your hands and take control over u n hack ur mind...

In certain circumstances, it may be wise to show your temper. Like when somebody repeatedly ignores fair demands of your's. If an employee is always late, does sloppy work, fall asleep at work, some hrsh words might make him/her realise that you are being harmed by their behaviour