Unexhaustiveness is an essential character of our knowledge of nature.

Also nature does not exhaust the matter for thought, namely there are thoughts which would not occur in any homogeneous thinking about nature.
The question as to whether sense-perception involves thought is largely verbal.

If sense-perception involves a cognition of individuality abstracted from the actual position of the entity as a factor in fact, then it undoubtedly does involve thought.

But if it is conceived as sense-awareness of a factor in fact competent to evoke emotion and purposeful action without further cognition, then it does not involve thought.

In such a case the terminus of the sense-awareness is something for mind, but nothing for thought.