No Cherubim for the tree of knowledge

Occasionally I review Bible verses i had memorized in my previous life as a believer.  Yesterday i was reciting Genesis chapter 3 and it reminded me of a silly question…  The deities didn’t want Adam and Eve to eat from the Tree of Life, so they put “cherubims and a flaming sword” to protect it.  The Tree of Knowledge on the other hand was placed in the middle of the garden, and left unguarded.  What did the deities really want?  The actions contradict the words. 

Genesis 22 has been on my mind a lot lately as well.  After this incident, when receiving new orders, did Abraham start wondering if the diety was serious?  If the diety ocassionally tricks you or engages in deception, how are you to know when the deity is sincere?  

No Cherubim for the tree of knowledge