Another partial answer that builds on previous answers by Bass and Barker and on Xenocacia's observarion. I might well be heading into the wrong direction here.

It has already been found that ...

>! ... the poem consists of the names of some of the 64 hexagrams in I Ching. Xenocacia has found that some of the letters in the image are slightly lighter. These letters spell _Morse_.

Now, ...

>! ... the hexagrams have numbers, but the also consist of six horizontal bars. These bars are either broken (Yin) or unbroken (Yang). The hexagrams in the poem are:  
>!  
>!   ||||¦|   13   Fellowship with men  
>!   ¦||¦¦|   17   Following  
>!   ¦¦¦¦¦¦    2   Receptive Earth  
>!   ||¦|¦|   37   Family / Clan  
>!   ¦|¦¦¦|    3   Difficulty at the beginning  
>!   ¦|¦¦|¦   29   Abysmal water  
>!   |¦¦¦|¦    4   Youthful folly  
>!   |¦|¦¦¦   35   Progress  
>!   ¦¦¦¦¦¦    2   Receptive Earth  
>!   |||¦|¦    6   Conflict  
>!   ¦|¦¦||   60   Limitation  
>!   ¦|||¦|   49   Revolution  
>!   ||¦|||    9   The Taming Power of the Small  
>!   |¦¦|||   26   The Taming Power of the Great  
>!   |¦¦|¦|   22   Grace  
>!   |¦||¦|   30   Clinging fire  
>!   ¦¦¦¦||   19   Approach  
>!   ¦|||||   43   Breakthrough  
>!   ||¦|¦|   37   Family / Clan  
>!  
>! (The hexagrams are shown sideways here, tilted by 90° to the left.)

Unfortunately, ...

>! ... I haven't found a way to get a sensible Morse message from these hexagrams. An obvious way would be to read them top-down (or left to right in the table above), where an unbroken bar is a dash and a broken bar two dots*.  
>!  
>! Other possible readings are to substitute an unbroken bar by just one dot or to place all hexagram next to each other and then read line-wise. None of that has given me any useful readings, but that may be owed to the difficulty of reverse-engineering a stream of unseparated Morse signals.  
>!  
>! I think that the numbers scibbles in the margin — 4, 3, 3, 3, 2, 1, ... — might refer to the length of either the first words or the first Morse-encoded letters.
>!  
>!    
>!    
>! \__\__\__\__  
>! *) When I do a web search for "hexagrams morse", one of the first results is a preview of _The Book That Proves Time Travel Happens_, which suggests just that and shows that the clinging Fire reads _tuna_ and the Family decodes to _mix_.