Have you stared people without blinking and with low light? That focus does what a photographic camera does and requires to FOCUS during enough time. Of course in our century when everything depends on neon or fluorescent light, many things have been forgotten or practiced in close ceremonies. Start watching the flame of a candel without blinking even if your eyes get filled with tears and burn. Indeed the ones who have achieved a spiritual level shine more... or maybe at the top of the mountain ST ELMO's blue-green FIRE shines with the hissing noise of a snake in certain cases or just the inner illumination of someone who knows deeper things or maybe ALL these alternatives.