(1.3.3.1) Even the material has more than 1,000 pages, the table of contents is only 6 pages
For example, the Python library reference has over 1,000 pages. To read all pages is very tough. You can not keep your motivation. However, the table of contents has only 6 pages. There are only 34 lines of section headings. The motivation to read them is easy to keep. So you should read them first. Then you grasp the overall picture of the 1,000 pages document. Although it is very rough.