Kena Upanishad

“Our life, a breath of force and movement and possession attached to a form of mind and body and restricted by the form, limited in its force, hampered in its movement, besieged in its possession and therefore a thing of discords at war with itself and its environment, hungering and unsatisfied, moving inconstantly from object to object and unable to embrace and retain their multiplicity, devouring its objects of enjoyment and therefore transient in its enjoyments, is only a broken movement of the one, undivided, infinite Life which is all-possessing and ever satisfied because in all it enjoys its eternal self unimprisoned by the divisions of space, unoccupied by the moments of Time, undeluded by the successions of Cause and Circumstance.

(…) The mortal life is a dual representation of That with two conflicting elements in it, negative and positive. Its negative elements of death, suffering, incapacity, strife, division, limitation are a dark figure which conceal and serve the development of that which its positive elements cannot yet achieve, — immortality hiding itself from life in the figure of death, delight hiding itself from pleasure in the figure of suffering, infinite force hiding itself from finite effort in the figure of incapacity, fusion of love hiding itself from desire in the figure of strife, unity hiding itself from acquisition in the figure of division, infinity hiding itself from growth in the figure of limitation. The positive elements suggest what the Brahman is, but never are what the Brahman is, although their victory, the victory of the gods, is always the victory of the Brahman over its own self-negations, always the self-affirmation of His vastness against the denials of the dark and limiting figure of things. Still, it is not this vastness merely, but the absolute infinity which is Brahman itself. And therefore within this dual figure of things we cannot attain to our self, our Highest; we have to transcend in order to attain.”

Commentary on the Kena Upanishad
Sri Aurobindo