Spiritual vs. material light

The light is divided into two kinds, material and spiritual. The material light is a vanishing matter and is known by etheric vibrations. But the spiritual light is the divine, eternal and never-ending quality and is a truth of the Kingdom. Blessed is thy face for that it hath taken a portion and a radiance from that Light. (‘Abdu'l-Baha, Tablets of Abdu'l-Baha v2, p. 249)