Selfishness is weakness. But loving and caring for others is a position of power beyond anything we can possibly imagine.
Life is at it's weakest when there is more doubt than trust. Life is strongest, when one learns to trust despite all the doubts!
When people FEAR losing an argument due to weak logic or incompetence, they begin to attack you personally with FULL emotion.
Those who yell their beliefs are trying to convince themselves. Sarcasm often reveals a weak position, guilt, or insecurity.