Excerpt from the Ribhu Gita (Verse 3 thru Verse 6):
“3. 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 wih the Supreme Absolute Reality and, remaining as that be happy.
4. Abde 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 no fear of duality at all — and be always, happy, unshakable and free from the fear arising from duality.
5. 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 certainty, neither being nor non-being, and no perception of duality — and be always happy, unshakable and absolutely free from the fear arising from duality.
6. Abide as That in which there is neither any defect nor good quality, neither pleasure nor pain, neither thought nor silence, neither misery nor austerities practiced for getting rid of misery, no “I-am-the-body” idea, no objects of perception whatsoever — and be always happy, free from all traces of thoughts.”