Definitions HQ

Substance (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠nothing but a collection of qualities with a name — plus an unknown something we fictionally suppose them to inhere in.

Substance (n.) of ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠any kind is something we have no idea of, material or spiritual, since no impression of it exists — we know nothing but particular qualities and perceptions.

Substance (n.) cannot ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠be seen, heard or tasted: if it came by the eyes it would be a colour, by the ears a sound — and nobody says substance is a colour.

Substance (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠the unintelligible something the imagination feigns to continue unchanged under all variations, reconciling the smooth sameness we feel with the diversity we see.

Substance (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠one only in the world, perfectly simple and indivisible, existing everywhere without local presence; every passion and every configuration of matter is merely its modification.