Awareness
Awareness is the centerpiece of spiritual traditions.
For alchemists who referred to a secret process that would turn low metal into gold, awareness was the hidden mysterious substance that needed to be added in order for the reaction to happen.
Of all the abilities and gifts and senses that a being has, awareness is the highest one that everyone possesses.
Some Buddhists spend years cultivating awareness by focusing on breathing or enduring disciplines meant to strengthen awareness. Anyone who has spent any time with that type of person understands why awareness is often symbolized as a light.
On this website awareness will be considered the highest human function.