giftedamateaur, I've heard it said:
"It's not what you have, but what you do with what you have."

When I attempted to look up this wise quote online, I did not find it attributed to a source, however the AI summarizer shared the following at the top of the results list of responses to my search:
Originally Posted by AI summarizer
Epictetus famously said, “It’s not what happens to you, but how you react”.

Mae West said, “It’s not what I say, but the way I say it”.

Caio Terra said “It’s not what you do, but HOW you do it” and

Rick Warren said "It's not what you do, but how much love you put into it that matters."

David S. Goyer further emphasized the importance of making the most of what we have.
Interestingly, these quotes all seem to apply to the concept of accepting that giftedness may not mean much, itself. Giftedness is but a high potential, and it is what is done with it (opportunity + effort) which may ultimately add the meaning.