It is not possible that this unity of knowledge, feeling and choice which you call your own should have sprung into being from nothingness at a given moment not so long ago; rather this knowledge, feeling and choice are essentially eternal and unchangeable and numerically one in all men, nay in all sensitive beings. But not in this sense—that you are a part, a piece, of an eternal, infinite being, an aspect or modification of it, as in Spinoza’s pantheism. For we should shave the same baffling question: which part, which aspect are you? What, objectively, differentiates it from the others? No, but inconceivable as it seems to ordinary reason, you—and all other conscious beings as such—are all in all. Hence this life of yours which you are living is not merely a piece of the entire existence, but is in a certain sense the whole; only this whole is not so constituted that it can be surveyed in one single glance.
Erwin Schrodinger. My View of the World.