Quote by Swami Vivekananda.

The first sign that you are becoming religious is that you are
becoming cheerful. When a man is gloomy, that may be dyspepsia, but it
is not religion. Misery is caused by sin, and by no other cause. What
business have you with clouded faces? It is terrible. If you have a
clouded face, do not go out that day, shut yourself up in your room.
What right have you to carry this disease out into the world?

— Swami Vivekananda