Those sentences often do make points of how a specific point he makes relates to the overall whole. It's just often not obvious at first glance what he's trying to point to.

Another nice quote:

Many of the structural points are of genuine impotance and interest to professional scientists, teachers, and others, who seldom, if ever, deal with such structural, linguistic, and semantics problems as are here analysed. The layman who will read the book diligently and repeatedly, without skipping any part of it, will get at least a feeling or vague notion that such problems do exist, which will produce a very important psycho-logical effect or release from the old animalistic unconditionality of responses, whether or not he feels that he has 'understood' them fully.

My earnest suggestion, backed by experience, to the reader is to read the book through several times, but not to dwell on points which are not clear to him. At each reading the issues will become clearer, until they will become entirely his own. Superficial reading of the book is to be positevely discouraged, as it will prove to be so much time wasted.

A few paragraphs later:

The diffculty in passing from the old system to another of different structure is not in the non-aristotelian system as such, which is really simpler and more in accord with commmon sense: but the serious diffculty lies rather in the older habits of speech and nervous responses, and in the older semantic reactions which must be overcome. These difficulties are, perhaps, more serious than is generally realized.