The Fundamental Truth

The Ribhu Gita (ऋभुगीता) forms the sixth part of Siva Rahasya Purana. It details in about two thousand verses the dialogue on the Self and Brahman between Sage Ribhu (who in turn heard it from Lord Shiva Himself) and Sage Nidagha on the slopes of the Mount Kedara in the Himalayas. (source: wikipedia). 

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• Why waste words? This is the truth in a nutshell. Only those who have earned the Grace of Lord Shiva by long devotional worship will get the rare opportunity of reading this scriptural text which leads to the bliss of peace everlasting in Brahman Self.
• Only that jnani who teaches 'Thou art the thought-free, alertly aware, absolutely still, ever blissful, intensely peaceful, unqualified Brahman Self', is the true SatGuru, and others are not.
• Unbroken abidance in the state of alert awareness, unruffled by thoughts, is Self realization. That is at once the spotless jivan mukti and the magnificent videha mukti. This state is easily attainable only for those who have earned the divine Grace of Shiva by deep devotion to Him, and not for others. What is stated here is the import in a nutshell of the message of that charming crest jewel of the Vedas known as the Upanishads.
• Those who give heed to this message and abide in accordance will forthwith attain mukti (liberation). They will not suffer from the least particle of affliction; they will enjoy a bliss far greater than the bliss attained from this and all other worlds; they and their environment will be filled with the plenitude of auspicious events. Totally free from all trace of fear, they will never again enter the cycle of births and deaths. They will become the immutable Brahman Self. All this we swear is the truth beyond doubt. By our Lord Shiva, again and again we swear that this is the fundamental truth.
• That state of still, pure, effulgent awareness is moksha, the state beyond compare. Those who maintain an unbroken abidance in that supreme state will never more be touched by suffering or confusion, and will be absolved from all duties. Such duties, if any, will somehow be completed without any volition on their part. They will eternally abide as the sole supreme  Self.

From "The Essence of Ribhu Gita" by Prof. N. R. Krishnamurthi Aiyer