The following four attributes are the attributes of Atman given in the Upanishad (“Shvetashvatara Upanishad” 6.11)
(1) It is sakshi, witness
(2) it is cheta, conscious
(3) it is kevala, one only; there is nothing besides it
(4) it is nirguna, without any.
Neither Plato nor Aristotle knew Atman; they discoursed only on buddhi. We should meditate on Atman in the form of “OM”. According to science, the world consists of matter, force and attributes but according to Vedanta these three and all others are Maya because they are neither sakshi, cheta, kevala or nirguna.
Remember these attributes and you will never be confused about distinguishing between Self and not-Self. Bhagavad Gita : Chapter 9 verse 6: “As the wind pervading the whole of space is great and reaches everywhere, so all the beings , know O Arjuna, abide in Me. ”
Atman is like the wind, pervading everything? jagat, attributes, matter, force, motion, change, are all pervaded by Atman.