First of all, the narrative tells us that the Buddha’s light illuminated the east. Is there any special meaning to the east? One interpretation is that illuminating the east actually illuminating all directions, because the east represents them all. Another idea comes from Sanskrit. As the word purva (“east” in Sanskrit) also means “past” or “origin,” illuminating the east could be interpreted as “illuminating the origin of humanity.” At any rate, the chapter depicts in detail all kinds of spiritual seekers who are illuminated by the ray of light. This symbolizes the universality of the Lotus Sutra, a teaching that is applicable throughout the cosmos.
Introduction to the Lotus Sutra