Real Interpreter or Pretender

Question: How can you tell a 'real' interpreter of God's words from a pretender? -- and I do not only refer to the 'publication' of the entire Script, there may be VAST differences between practical interpretations of the rightfully published details, whatever is included in the authentic total. (Look at e.g. the political variations as 'religious' prescriptions, law systems, state-formats, stuff to learn about the world etc.)  

Answer: A real messenger/prophet/interpreter does not ask for any personal benefit or remuneration. The pretenders seek worldly benefits. Following are quotes from the preachings of some messengers: 

Quoting Messenger Noah: http://quran.com/26/109 Sahih International

And I do not ask you for it any payment. My payment is only from the Lord of the worlds.

Quoting Messenger Hud: http://quran.com/26/127 Sahih International

And I do not ask you for it any payment. My payment is only from the Lord of the worlds.  

Quoting Messenger Saleh: http://quran.com/26/145 Sahih International

And I do not ask you for it any payment. My payment is only from the Lord of the worlds. 

Quoting Messenger Lot: http://quran.com/26/164 Sahih International

And I do not ask you for it any payment. My payment is only from the Lord of the worlds. 

Quoting Messenger Shu'ayb: http://quran.com/26/180 Sahih International

And I do not ask you for it any payment. My payment is only from the Lord of the worlds.