There are different stages of the development of calm and equality in the being. Early stages are in many instances “negative equality” but these do not adequately embody the eventual unification with the Divine Spirit that manifests the universe. This Divine Spirit is founded in the principles of Sat-Chit-Ananda, and thereby encompass the bliss that exists behind and inherent in all that manifests in the universe. In the Taittiriya Upanishad the bliss of the Eternal Spirit is equated to the experience of “the vedawise whose soul the blight of desire not toucheth.” As Sri Aurobindo has explained, the overcoming of desire and ego leads to unity with the Divine Spirit, and with that unity comes the experience of the highest forms of bliss, Ananda.
Sri Aurobindo observes: “As the equality becomes more intense, it takes on a fuller substance of positive happiness and spiritual ease. This is the joy of the spirit in itself, dependent on nothing external for its absolute existence,…, an exceeding inner happiness, …. Nothing can disturb it, and it extends itself to the soul’s view of outward things, imposes on them too the law of this quiet spiritual joy. For the base of it is still calm, it is an even and tranquil neutral joy,… . And as the supramental light grows, a greater Ananda comes, the base of the abundant ecstasy of the spirit in all it is, becomes, sees, experiences and of the laughter of the Shakti doing luminously the work of the Divine and taking his Ananda in all the worlds.”
The Katha Upanishad declares: “The calm soul having comprehended the great Lord, the omnipresent Self by whom one beholds both to the end of dram and to the end of waking, ceases from grieving.” Sri Aurobindo, The Upanishads, Katha Upanishads, 2nd Cycle: 1st Ch., v. 4, pg. 230)
“One calm and controlling Spirit within all creatures that makes one form into many fashions: the calm and strong who see Him in their self as in a mirror, theirs is eternal felicity and ’tis not for others.” (Katha Upanishad, 2nd cycle: 2nd Ch. v. 12, pg. 236)
Sri Aurobindo, The Synthesis of Yoga, Part Four: The Yoga of Self-Perfection, Chapter 13, The Action of Equality, pp. 697-698