The Related Suttas Collection 1.26

3. A Sword

Lamps

“How many lamps are there that light up the world? We’ve come to ask the Buddha; how are we to understand this?”

“There are four lamps in the world, a fifth is not found. The sun blazes by day, the moon glows at night,

while a fire lights up both by day and by night. But a Buddha is the best of lights: this is the supreme radiance.”