There is one side that we present to the world and there is another side that we keep hidden within ourselves. The inner part is very vulnerable and contains all of our doubts and fears. It's that scared little child who just wants to be loved and taken care of. It's that part of us that needs protection.
Many times, we never show that inner side of ourselves. Many people spend their entire lives showing the hard exterior and never allowing that inner part to see the light of day. It's a mechanism to prevent ourselves from being taken advantage of or hurt.
So, the trick becomes... how do I show both sides of myself and create a balance between strength and empathy?