Harmony is the natural rule of the spirit, it is the inherent law and spontaneous consequence of unity in multiplicity, of unity in diversity, of a various manifestation of oneness.
Aurobindo argues that harmony is not constructed but is the ontological expression of spirit’s unity-in-diversity, distinguished from both blank unity (which admits no harmony) and pure diversity (which yields only discord or artificial arrangement).
, The Life Divine, 1939thesis