What is enquiry into the Truth? It is the firm conviction that the Self is  real, and all, other than That,  is unreal.

The witness of the three states of consciousness [waking, dream and deep sleep] and of the nature of Existence-Consciousness-Bliss is the Self

Knowing that I am different from the body, I need not neglect the body. It is a vehicle that I use to transact with the world. It is the temple which houses the Pure Self within.

There is sorrow in finitude. The Self is beyond time, space and objects. It is infinite and hence of the nature of absolute happiness.

Each thing tends to move towards its own nature. I always desire happiness which is my true nature. My nature is never a burden to me. Happiness is never a burden to me, whilst sorrow is.

Thus one should know oneself to be of the nature of Existence-Consciousness-Bliss[Sat-Chit-Ananda].

But the jiva [living being] is endowed with ego and his knowledge is limited, whereas Ishwar is without ego and is omniscient.