Scholars only occasionally consult a few of the books which every philosopher would consider any true intellectual writing about any subject of interest to all serious students of human culture should be familiar with and make all his or her students read.
http://books.google.ca/books?id=cqc8VqybPI0C&pg=
PA146&lpg=PA146&dq=%22ellipsis%22+shakespeare&source
=web&ots=lh-RBwxaIe&sig=cOpSleGOqJgPnUqmwnli
28NjeJo&hl=en&sa=X&oi=book_result&resnum=2&ct=result#
PPA155,M1
PAGE 155
Here's my interpretation of it:
Scholars only occasionally consult a few(=passage) of the books which(=passage) every philosopher would consider any true intellectual writing(,) about(refers to passage) any subject of interest to all(,) (something) serious students of human culture should be familiar with(,) and make all his or her students read(refers to passage).