The terms above and below do not apply for realms beyond Time and Space. The Supermind is the Omnipotence and Omniscience of the Supreme. It is the Truth that is the basis of creation and the ordainer of the Divine Law that governs all creatures. Hence the Supermind is also known as The Lord or The Creator.
Sacchidananda is the Divine Being who is everywhere and in everything, within as well as beyond the Cosmos. One can find the Sacchidananda everywhere but the Supramental is the Lord, the King who dwells beyond the highest reach of the Mind, beyond even the gods. We can say therefore that the Supermind is the Creator aspect of the Sacchidananda, His absolute Knowledge and Power. So you see wherever there is Sacchidananda, there is also the Supermind. But here it is veiled and acts from behind the Ignorance whereas in its own realm the Supramental is revealed in all its Splendour.
Even the realms of Satloka, Chidghana loka, Anandaloka are differentiated by the Supermind. So to speak of Supermind as something lower than Sacchidananda is like saying a person is higher without his knowledge and power!
Affectionately,
Alok Da
