Pranayama is supervised breathing, in a specific pattern, for a specific reason. Many people are surprised at how good they feel after practicing Yogic breathing on a daily basis. If you start today, there is a strong possibility you will breathe your problems away.
Unfortunately, history has documented far too many holocausts for us to ignore the right to defend oneself. To be humble on the outside, but bold within, is a much safer course when you plan your day. When you put your best foot forward, most people will respect you for it, but beware of those who see your good manners and kindness as a sign of weakness.