Innate nature is peace and happiness.
Sat-Chit-Ananda
Transparent Being Awareness.
Impersonal, universal.
The shining light of Being. 
The I-thought misleads you into perceiving a separate self and an external world.
This unhappy impression of separation is like the canary in the coal mine that leads you to contemplate the reality that is beyond thought.
The certainty of the Self is a direct knowingness that bypasses thought.
What is perceived is not knowing.