Question: How can our outer smile help our running?Sri Chinmoy: Your outer smile can help your running considerably. When you smile, you disarm your opponent. Take running, for the time being, as your opponent. While you are fighting or struggling with your enemy, which is running, if you give a smile, naturally your enemy will lose some of its strength. So play a trick on your enemy by smiling. This may sound absurd, but I assure you it is true. Just think of the running world as an enemy and weaken the strength of this enemy by giving a smile.
Sri Chinmoy, The outer running and the inner running, Agni Press, 1984