Pure Thought vs the Senses ?

Thê evolution of philosophic thought through the Centuries the following question has played a major role. What knowledge  is pure thought able to supply independently of sense perception ?

Is there any such knowledge? If not, what precisely is the relation between our knowledge and the raw-material furnished by sense-impressions? 

An almost boundless chaos of philosophical opinions corresponds to these questions and to a few others intimately connected with them. Nevertheless. there is visible in this process of relatively fruitless but heroic a systematic trend of development, namely an increasing endeavours skepticism concerning every attempt by means of pure thought to learn something about the "objective world," about the world of "things" in contrast to the world of mere "concepts and ideas." 

Be it said parenthetcally that, just as on the part of a real philosopher, quotation-marks ae used here to introduce an "illegitimate" concept, which the reader is asked to permit for the moment, although the concept is suspect in the eyes of the philosophical police.

The above quote is introduced but paused here because i ask that those who agree or disagree are given a chance to connect yet relied upon to comment if willing ?

By way of  a question,what do you think pure thought is or means ?

Please  drop your ideas below in the comments.

By Digital Anvil.