Baha’u’llah is the “lamp” that gives out the light of God’s “own Self” to all that are in heaven and all that are on earth

And when I turn to my left, I hear the clamor of the wicked doers who have disbelieved in Thee and in Thy signs, and persistently striven to put out the light of Thy lamp which sheddeth the radiance of Thine own Self over all that are in Thy heaven and all that are on Thy earth.

- Baha’u’llah (Prayers and Meditations by Baha’u’llah)