The fear of never being as good again is supposed to be obtrusive. The resistance is telling you to keep your lasting image as one of the greatest so you can retire on top.
But the itch to play again is usually stronger than the public’s perception of your invincibility. Most athletes who return to sports or keep playing late into their careers still have the confidence but lose their innate ability. There are ways to circumvent this natural attrition. Michael Jordan improved his shooting game with the fadeaway. He also became a better team leader as he got older.
Wearing down is also true of artists. At some point, artists lose their creative energy and their work output suffers, as does their ability to think outside the box. All good work come to an end. It’s up to you to decide how perfectly indelible you want your lasting image to be.
You may lose your ability as time goes on but the sheer joy and appreciation of playing the game and making art persists.