Talent

You’re only just able to smell the perfume you’re wearing or your unpleasant body smell, but as you would expect, that degree of smell is usually different from the actual smell that other people catch whiff of.

Same way, people who’re gifted may not be as conscious of their talents as other people will expect. It is the beholders that are mostly wowed by what these people can do without much effort and how they could or should pursue that uncommon gift.

Now since the talented one is already exposed to his gift, his mind gets accustomed to it, and it doesn't become anything special to him, naturally ejecting any feeling of outstanding ability, because he’ll now be inclined to feel that he’s only doing what anyone can do.

If you ask me, the person is happier unsung than overly praised, because the latter may inflate his opinion of himself, and may set overconfidence in motion. Don’t get me wrong, confidence is a good thing. Being "excessively" confident is what I am talking about. It can be a catalyst for foolish adventures.