— 428 —
Sixthly, Names of simple Ideas stand for Ideas not at all arbitrary.       §17. Sixthly, The Names of simple Ideas, Substances, and mixed
Modes, have also this difference; That those of mixed Modes stand
for Ideas perfectly arbitrary: Those of Substances, are not perfectly so;
but referr to a pattern, though with some latitude: and those of simple Ideas
are perfectly taken from the existence of things, and are not arbitrary
at all. Which what difference it makes in the significations of their
Names, we shall see in the following Chapters.
The Names of simple Modes, differ little from those of simple Ideas.
Locke Hum III, 4, §17, p. 428