The bible passage at Luke 15 speaks about being a "Sheep who is lost". The shepherd looks for and brings the sheep back into the fold.
The passage at Matthew 13 speaks about the righteous being like Wheat - kept separate from the weeds.
BUT, there is an inherent problem with both passages! For what reason are the Sheep saved? For what reason is the Wheat kept separate? TO BE CONSUMED, EATEN OR USED by men!
The sheep is "saved" only to be exploited for wool - or worse yet - to be EATEN by men.
The Wheat is grown and kept apart from the weeds to be EATEN as food for men.
So, is it a good thing to be referred to as these things?
Just a thought...