We can also see a necessity to Mind-Life-Matter when it comes to an actual manifestation of forms. Supermind organizes and determines the relations, but it is then necessary to have the forms able to act from their own standpoint so that there is interaction and development. Otherwise, we have something akin to a dream state with free-form association and change, but no systematic development. Sri Aurobindo describes Mind as “essentially that faculty of Supermind which measures and limits, which fixes a particular centre and views from that the cosmic movement and its interactions.” While it is feasible to conceive of different relationships of Mind to different cosmic arrangements, one way or the other, more or less flexible, more or less conscious, more or less aware of the Oneness that stands behind and contains the Multiplicity, the action of Mind to organise, limit and arrange is necessary if there is going to be any realistic manifestation of forms in some coherent and systematic way. Mind gives the ability to look at the universal creation from separate viewpoints or standpoints and to act from that direction upon the overall action of the cosmos.
reference: Sri Aurobindo, The Life Divine, Chapter 27, The Sevenfold Chord of Being