Teachings of Swami Vivekananda - Cheerfullness

By the practice of cleanliness, the Sattva material prevails, and the mind becomes concentrated and cheerful. 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. A pleasurable feeling is the nature of the Sattva. Everything is pleasurable to the Sattvika man, and when this comes, know that you are progressing in Yoga.  CW Vol. 1 P. 264