the mind > mental capacity > perception or cognition > faculty of ideation > idea, notion, or concept > [noun] > system of (9)
Frequently as a count noun. A particular system of ideas or beliefs relating to the general scheme of existence and the universe; a philosophical…
Frequently (and in early use usually) with capital initial. The defining spirit or mood of a particular period, esp. as reflected in the…
a system of related ideas or images.