Symeon the New TheologianThinkers

Divine light (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠like fire kindled from fire: you receive the whole, yet the source stays undiminished, and it rises in the heart like the disc of the sun.

The Inner light (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠sought through the air, the heavens and the abysses, and found at last within the heart, shining like a spherical sun.