Quote
"Wo viel Licht is, ist starker Schatten."
"It is manifest that everything in the world, whether it be substance or accident, produces rays in its own manner like a star... Everything that has actual existence in the world of the elements emits rays in every direction, which fill the whole world."

Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. Visible light spans the visible spectrum and is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terahertz. The visible band sits adjacent to the infrared and the ultraviolet, called collectively optical radiation.
"Wo viel Licht is, ist starker Schatten."
"Walk while ye have the light, lest darkness come upon you."
"I have also cleared the electromagnetic theory of light from all unwarrantable assumption, so that we may safely determine the velocity of light by measuring the attraction between bodies kept at a given difference of potential, the value of which is known in electromagnetic measure."
"A man should learn to detect and watch that gleam of light which flashes across his mind from within, more than the lustre of the firmament of bards and sages. Yet he dismisses without notice his thought, because it is his. In every work of genius we recognize our own rejected thoughts: they come back to us with a certain alienated majesty."
"Corruption springs from light: tis one same power Creates, preserves, destroys; matter whereon It works, on eer self-transmutative form, Common to now the living, now the dead."
"The black moment is the moment when the real message of transformation is going to come. At the darkest moment comes the light."