Determinant of the circumstance, a lot of times it is heavily beneficial for a person to keep a smile on their face, even though the emotional or physical pain that they are experiencing is weighing them down. For example, when a leader is wounded emotionally or physically it would greatly affect the morale of his/her followers if he/she were to stop leading and to change the focus of leading the group to accomplish a goal to stopping everyone's journey in order to complain about a newly arisen misfortune.

It takes more strength to be able to keep a smile on your face and to keep moving forward towards a goal, than it does to let a serious emotional or physical wound effect you of course, but what would life be without it's challenges? Whether we choose to believe it or not staying positive and keeping a smile on our face is infectious, our positivity will infect everyone around us, and so will our negativity. You must choose at times of extreme pain to be strong and make sure no one ever sees you sweat!