— 179 —
      §25. If those Ideas, which are constantly joined to all others, must
therefore be concluded to be the Essence of those Things, which
have constantly those Ideas joined to them, and are inseparable
from them; then Unity is without doubt the essence of every thing.
For there is not any Object of Sensation or Reflection, which does
not carry with it the Idea of one: But the weakness of this kind of
Argument, we have already shewn sufficiently.
Locke Hum II, 13, §25, p. 179