Two are there, hidden in the secrecy of the Infinite, the Knowledge and the Ignorance; but perishable is the Ignorance, immortal is the Knowledge; another than they is He who rules over both.
Aurobindo, citing the Swetaswatara Upanishad, establishes Ignorance as a cosmic paired-opposite to Knowledge, governed by a transcendent third principle, making it structurally constitutive of existence rather than accidental.
, The Life Divine, 1939thesis