Darśana, is from the Sanskrit root: dṛś, literally, ‘To See’. The Sanskritic analogue of the Greek Phílosophía [‘Lover of Wisdom’] is the Seer: ‘One who See’s’.
One loves Wisdom of course, but it is not settled until one ‘Sees’. Argument is docked on assumption, Faith on belief. One can question it; reroute the inference; toss-up diversionary flak. But it’s a lot harder to ‘Unsee’ what you ‘See’. All orthodox Hindu schools of Philosophy are officially Darśanas.
Shūnyam as its translated expression ‘Absolute Absence’ implies, is not a relational term. It is ‘Seen’. You don’t think about it, conceptualize or imagine it, all things done within the aegis of the Two-ness Template.
‘Seeing’ in its analytic meaning is is all about catching the beam in your own eye. I catch the beam in my eye: and catch myself catching myself; and catch myself catching myself catching myself. And so on.
I look in a mirror and see my eye. I see my eye seeing my eye. I see my eye seeing my eye seeing my eye..
I see my Mind seeing my Mind. I catch my Thought catching my Thought. I Know. I Know that I Know. I Know that I Know that I Know…
This can get a little more loopy when the high inferential abstractions of Logic and Language are at play. Try your hand at: ‘All Words are Meaningless’-itself an expression in words. Or: ‘I don’t Exist!’
Darśana is the ‘Backward Step’, an ‘Infinite Regress’ back to ‘True Nothing’
There are levels and levels of ‘Seeing’. For a pious Hindu, to see the adorned deity with a full and sincere heart is in turn to be seen by the deity in an act of divine grace [and often, such simple piety trumps all philosophy and metaphysics].
Watch out, though. Sanskrit Literature carries a long list of exclusive sightings made over the centuries by God-Men and Knaves. Each is raised up the flagpole and if anyone salutes a new school is born. All orthodox schools are officially Darśanas.