Balance of Nature and Rules of Nature

What an excellent lesson in living for life to learn.. EXCEPT one for  the last line implies within one's  own species while the first 5 lines does imply nothing about its own species but suggests without prejudice the entire ecology and balance of nature in and of the surrounding environment microcosm and macrocosm. 

Too often we do live just for our own species selfishly, and in particular most problematicly, just a select few of our own kind excluding some or even all other species right to exist as well  and ignore the life sustaining environment's preservation conditions and constraints. The Rule of Nature is Balance of Nature with no one species killing off all of the others. 

This is the unforgivable sin God warned Man about?