” The first sign that you are becoming religious is when you start behaving cheerful. To the yogi everything is bliss. Every face they see brings cheerfulness to them. That is the sign of a virtuous person.
Misery is caused by sin and by no other cause. What business do you have of a clouded face? It is terrible. If you have a clouded face, do not go out that day. Shut your self in your room.
What right do you have to carry this disease out into the world? When your mind has control, it has control over the whole body; instead of being a slave to the machine, the machine becomes your slave. Instead of this machine being able to drag you down, the machine becomes the greatest helpmate.”
Swami Vivekananda
The Yoga Bridge 