Sariputra, who felt like dancing with joy stood up, pressed his palms together, looked up at the honorable face, and said to the Buddha, “Hearing this truthful voice of yours, I feel like dancing with joy. I have never felt like this before” (p. 51).
Why was he so delighted? He explains that previously, as one of the “hearers,” he had been satisfied with his accomplishments, but couldn’t help feeling that he was still missing something. Now at last he understood what had been bothering him, and realized that he was truly a child of the Buddha.
Introduction to the Lotus Sutra