Some Ans. Questions 1908 by -'Abdu'l-Bahá- 1 Para

Reflect that light is the expression of the vibrations of the etheric matter: the nerves of the eye are affected by these vibrations, and sight is produced. The light of the lamp exists through the vibration of the etheric matter; so also does that of the sun, but what a difference between the light of the sun and that of the stars or the lamp! (150:1)

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