The sense, the idea, the experience that I am a separately self-existent being in the universe, and the forming of consciousness and force of being into the mould of that experience are the root of all suffering, ignorance and evil. And it is so because that falsifies both in practice and in cognition the whole real truth of things; it limits the being, limits the consciousness, limits the power of our being, limits the bliss of being; this limitation again produces a wrong way of existence, wrong way of consciousness, wrong way of using the power of our being and consciousness, and wrong, perverse and contrary forms of the delight of existence. The soul limited in being and self-isolated in its environment feels itself no longer in unity and harmony with its Self, with God, with the universe, with all around it; but rather it finds itself at odds with the universe, in conflict and disaccord with other beings who are its other selves, but whom it treats as not-self; and so long as this disaccord and disagreement last, it cannot possess its world and it cannot enjoy the universal life, but is full of unease, fear, afflictions of all kinds, in a painful struggle to preserve and increase itself and possess its surroundings, for to possess its world is the nature of infinite spirit and the necessary urge in all being. The satisfactions it gets from this labour and effort are of a stinted, perverse and unsatisfying kind: for the one real satisfaction it has is that of growth, of an increasing return towards itself, of some realisation of accord and harmony, of successful self-creation and self-realisation, but the little of these things that it can achieve on the basis of ego-consciousness is always limited, insecure, imperfect, transitory. It is at war too with its own self, first because, since it is no longer in possession of the central harmonising truth of its own being, it cannot properly control its natural members or accord their tendencies, powers and demands; it has not the secret of harmony, because it has not the secret of its own unity and self-possession; and, secondly, not being in possession of its highest self, it has to struggle towards that, is not allowed to be at peace till it is in possession of its own true highest being. All this means that it is not at one with God; for to be at one with God is to be at one with oneself, at one with the universe and at one with all beings. This oneness is the secret of a right and a divine existence. But the ego cannot have it, because it is in its very nature separative and because even with regard to ourselves, to our own psychological existence it is a false centre of unity; for it tries to find the unity of our being in an identification with a shifting mental, vital, physical personality, not with the eternal self of our total existence. Only in the spiritual self can we possess the true unity; for there the individual enlarges to his own total being and finds himself one with universal existence and with the transcending Divinity.
—The Synthesis of Yoga The Liberation of the Spirit; Sri Aurobindo; pg. 652-653