Anger uncontrolled is like a volcano. Yet, anger itself is not to be feared. If directed and harnessed responsibly it can create momentous change. Did peace protestors protest peace because they felt peace? No! They protested because they were angry with the war.
Our beautiful, loving, open hearts have at one time or another been tromped on, broken or betrayed and so our normal, and probably necessary action at the time, was to build walls, force fields, layers of protection around our hearts… resulting in the miniature, shrunken love quotients most of us walk around with.