The point of combustion.

"You are not the oil, you are not the air—merely the point of combustion, the flash-point where the light is born. You are merely the lens in the beam. You can only receive, give and possess the light as a lens does. If you seek yourself, ‘your rights,’ you prevent the oil and air from meeting in the flame, you rob the lens of its transparency. Sanctity—either to be the Light, or to be self-effaced in the Light, so that it may be born, self-effaced so that it may be focused or spread wider." —Dag Hammarskjold