the negative movement of freedom is a liberation from the principal bonds, the master-knots of the lower soul-nature, the positive side an opening or growth into the higher spiritual existence. But what are these master-knots — other and deeper twistings than the instrumental knots of the mind
Aurobindo identifies four ‘master-knots’ — desire, ego, duality, and the gunas — as the structural psychic bonds whose severing constitutes liberation, distinguishing them from secondary, instrumental knots.
, The Synthesis of Yoga, 1948thesis