Everyone has a different answer for what the Self is. But do they have any idea what it really is? Is the Self actually the fundamental unit of existence? Many people are happy to believe that the universe is made of matter. What would it mean to say that the universe is made of mind? If material atoms are made of subatomic particles, what would immaterial minds be made of? The only thing a mind can be made of is thoughts. After all, that's what a mind does. It thinks. What does thinking mean? It means using thoughts. It means combining "atomic" thoughts into "molecular" thoughts. In physics, string theory claims that reality is made up of infinitesimally small, one-dimensional vibrating strings. As the strings vibrate, twist, fold, come together and split apart, they produce all the effects that traditional physics addresses, all the stuff to do with atoms and their interactions, and including large-scale material phenomena like gravity. But what if the real "strings" were actually zero-dimensional rather than one-dimensional, and immaterial rather than material? What if they were actually what thoughts are, and so to say that physics arises out of material strings could be replaced by the statement that physics is made out of immaterial thoughts? Where strings are one-dimensional, extended and material, thoughts are zero-dimensional, unextended and immaterial, but their combinations produce dimensional, material, extended things (thanks to the incredible properties of phase in ontological Fourier mathematics). All you have to do to replace materialism (reality is made of matter) with idealism (reality is made of mind) is to reduce scientific "strings" to their analytic mental equivalents, which turn out to be sinusoidal waves, which exist in the mathematical precursor domain that serves as the origin, the cause, of the domain of physics. Mathematics, in itself, is a dimensionless Singularity system. Ontological mathematics is the subject that deals with the mathematical Singularity that precedes the Big Bang. This Singularity, when properly understood, comprises autonomous selves – called monads – made of basis thoughts, which are none other than sinusoidal waves. The self is an eternal and necessary entity. It has existed forever, and it, with its fellow selves, is the author of everything. We inhabit a universe of mental selves, not of physical matter. Selves create matter. Matter does not create selves.