Yoga Vasistham

 When the mind perceives duality

then there is both duality and its

counterpart, which is unity. When

the mind drops the perception

of duality, there is neither

duality nor unity.

When one is firmly established

in the oneness of the Infinite

consciousness, whether he

is quiet or actively engaged

in work, then he is considered

to be at peace with himself.

This is the supreme state, the

state of non-self, or the state

of knowledge of the void

or emptiness