WHEN APPLIED TO INCORPOREAL THINGS, "PARTS" HAVE DIFFERENT SENSES.
Project Gutenberg EPUB3 edition
Plotinus and Guthrie, Kenneth Sylvan
Further, treating of incorporeal things, "parts" is taken in several senses. Speaking of numbers, we may say that two is a part of ten (referring exclusively to abstract numbers). We may also say that a certain extension is a part of a circle or line. Further, a notion is said to be a part of science.