Sachchidananda is the unity of the many-sidedness of manifested things, Sachchidananda is the eternal harmony of all their variations and oppositions, Sachchidananda is the infinite perfection which justifies their limitations and is the goal of their imperfections.
This passage delivers Aurobindo’s most concentrated definitional statement of the term, asserting that Sachchidananda is simultaneously the ontological ground, the reconciling harmony, and the teleological endpoint of all manifested existence.
, The Synthesis of Yoga, 1948thesis