In the older psychologies the soul or self took the place of the sugar, fire, or skin. The lower feelings produced _effects on it_, and their apparent compounds were only its reactions. As you tickle a man's face with a feather, and he laughs, so when you tickle his intellectual principle with a retinal feeling, say, and a muscular feeling at once, it laughs responsively by its category of 'space,' but it would be false to treat the space as simply made of those simpler feelings. It is rather a new and unique psychic creation which their combined action on the mind is able to evoke. I found myself obliged, in discussing the mind-dust theory, to urge this last alternative view. The so-called mental compounds are simple psychic reactions of a higher type. The form itself of them, I said, is something new. We can't say that awareness of the alphabet as such is nothing more than twenty-six awarenesses, each of a separate letter; for those are twenty-six distinct awarenesses, of single letters _without_ others, while their so-called sum is one awareness, of every letter _with_ its comrades. There is thus something new in the collective consciousness. It knows the same letters, indeed, but it knows them in this novel way. It is safer, I said (for I fought shy of admitting a self or soul or other agent of combination), to treat the consciousness of the alphabet as a twenty-seventh fact, the substitute and not the sum of the twenty-six simpler consciousnesses, and to say that while under certain physiological conditions they alone are produced, other more complex physiological conditions result in its production instead. Do not talk, therefore, I said, of the higher states _consisting_ of the simpler, or _being_ the same with them; talk rather of their _knowing the same things_. They are different mental facts, but they apprehend, each in its own peculiar way, the same objective A, B, C, and D. The theory of combination, I was forced to conclude, is thus untenable, being both logically nonsensical and practically unnecessary. Say what you will, twelve thoughts, each of a single word, are not the self-same mental thing as one thought of the whole sentence. The higher thoughts, I insisted, are psychic units, not compounds; but for all that, they may know together as a collective multitude the very same objects which under other conditions are known separately by as many simple thoughts.