How you know?
You have been through that dark road of void, with no sight, with no colours, and you survived those nights, though devil sitting on your side.
With tears but Without complains you walked this path.
You have been in love too, you have felt it's spark, the fresh blossom fragnance, the body full of energy, the lightning running with that single sight and melting heat in cold.
And when the time came, without expectations you let it go.
And now you know the colours hidden more than in the visible rainbow, now you know the sight beyond doubt and faith. Now you know the difference between survivor and the warrior.
Now You Know.