Throughout history, The Light Clan is known as the Herald of Angels, the Angels themselves cannot converse with the humans, as when they do the humans die of satisfaction in their souls after they came in contact with them.
The Light Clan is the messenger of heavens, they are half-Angel, half-mortal, a Philanthropist.
Unlike Angels, The Philanthropist's lifespan is over a thousand, while Angels are immortals.
The Angels only have one goal, to send the words of God to the mortals, and the Light Clan is the first one to receive its blessing.
Since they send them to the other mortals afterward, the Angels decided they should receive its blessing first beforehand to honor their labor to God.
"Now Children of God, one day you will serve God as one of the messengers, no matter what position
