Concentration of the mind is in a way common to both Knowledge and Yoga. Yoga aims at union of the individual with the universal, the Reality. This Reality cannot be new. It must exist even now, and it does exist.

For those who have obtained unobstructed knowledge of Self, the world is seen merely as a bondage causing imagination.

Even the structure of the atom has been found by the mind. Therefore the mind is subtler than the atom. That which is behind the mind, namely the individual soul, is subtler than the mind.

From where does this "I" arise? Seek for it within; it then vanishes. This is the pursuit of wisdom. When the mind unceasingly investigates its own nature, it transpires that there is no such thing as mind. This is the direct path for all. The mind is merely thoughts. Of all thoughts the thought "I" is the root.

The place where even the slightest trace of the 'I' does not exist, alone is Self.

Know that the eradication of the identification with the body is charity, spiritual austerity and ritual sacrifice; it is virtue, divine union and devotion; it is heaven, wealth, peace and truth; it is grace; it is the state of divine silence; it is the deathless death; it is jnana, renunciation, final liberation and bliss.

...Bliss is not something to be got. On the other hand you are always Bliss. This desire [for Bliss] is born of the sense of incompleteness. To whom is this sense of incompleteness? Enquire. In deep sleep you were blissful. Now you are not so. What has interposed between that Bliss and this non-bliss? It is the ego. Seek its source and find you are Bliss.