It is a difficult psychological question whether sense-perception involves thought; and if it does involve thought, what is the kind of thought which it necessarily involves.

Note that it has been stated above that sense-perception is an awareness of something which is not thought.
Namely, nature is not thought.

But this is a different question, namely that the fact of sense-perception has a factor which is not thought.

I call this factor 'sense-awareness.' Accordingly the doctrine that natural science is exclusively concerned with homogeneous thoughts about nature does not immediately carry with it the conclusion that natural science is not concerned with sense-awareness.
However, I do assert this further statement; namely, that though natural science is concerned with nature which is the terminus of sense-perception, it is not concerned with the sense-awareness itself.
I repeat the main line of this argument, and expand it in certain directions.
Thought about nature is different from the sense-perception of nature.
Hence the fact of sense-perception has an ingredient or factor which is not thought.

I call this ingredient sense-awareness.