In Chapter 1, Introduction, the congregation waited anxiously for this definitive sermon, the way to which had already been prepared by the Sutra of Innumerable Teachings. But Sakyamuni did not begin immediately. First, he preached the opening sutra … . Then he entered into its deep meditation. His body and mind became motionless. The assembled gods rained mandarava flowers upon him. The world quaked in six ways. The assembled beings looked on in astonishment and joined their hands together in supplication. Finally the Buddha emitted a ray of light from the white curl between his eyebrows (the so-called “third eye”) and illuminated all the eighteen thousand worlds to the east, from their lowest hells up to their highest heavens.
These are called the “Six Omens Shown in This World.” In order, they are “Preaching,” “Entering into Samadhi,” “Raining Flowers,” “Quaking,” “Delighting,” and “Emitting a Ray of Light.”
Introduction to the Lotus Sutra