Ribhu Gita, Chapter 26, Verse 1-5
I shall now expound to you the method of inhering in the All-inclusive and undifferentiated Reality. This teaching is secret and difficult to understand even with the help of the various Scriptures. Even celestial beings and practitioners of spiritual discipline who hold it dear acquire it only with great difficulty.
Follow what I say and, inhering in Reality, be happy.
My son! Realized sages say that absolute inherence in Reality means becoming one with the immutable, tranquil, non-dual Absolute Supreme Being which is Existence-Consciousness-Bliss and the Self of all, and making the wandering mind one with it like the proverbial milk and water, absolutely free from all concepts.
When one scrutinizes this variety of manifestation one realizes that it does not really exist and that everything is the undifferentiated Absolute Supreme Being which is not different from the Self and oneself. Let this knowledge become firm with you by constant practice. Then, discarding everything, become one with the Supreme Absolute Reality and, remaining as that, be happy.
Abide as That which does not, when scrutinized, show any duality in the form of these various objects or the least trace of cause and effect, That in which, when the mind is absorbed in It, there is not fear of duality at all – and be always happy, unshakable and free the fear arising from duality.
Abide as That in which there are neither thoughts nor fancies, neither peace nor self-control, neither the mind nor the intellect, neither confusion nor certainly, neither being nor non-being, and no perception of duality – and be always happy, unshakable and absolutely free from the fear arising from duality.
SOURCE:
Self-Enquiry 