When the mind is pure, the disciples of the Noble Ones gain a sense of the goal, gain a sense of the Dharma, gain joy connected with the Dharma.
In those who are joyful, bliss arises. In those who are blissful, the body grows calm. Those whose bodies are calmed experience ease. In those who are at ease, the mind becomes concentrated.
—Buddha Shakyamuni, Mahatma Sutta