But for its bliss, life would not be tolerated even for a moment. It would be voluntarily liquidated. Out of the fully blossomed flower of emotion flows the nectar of anandam. The difference between the existence's of these two has to be taken note of. A living being is aware of its own existence while the other is not.
Awareness is born of cognition and it is self-evident.
A living being knows that it exists. This act of knowing is cognition. There is a variation in the intensity of cognition. Highly evolved beings have more of cognition while those in the early stages have it enshrouded in inertia. The difference between one life and another is in the degree of cognition.