Yes, it is!
Your best work is still in you. Your best art. Your best financial model. Your best film. Your best book. Your biggest client presentation.
Never forget that the best is yet to come.
But, don't make it your form of hiding. Don't make it as an excuse for not doing your best now.
The best is not going to come to those who stop trying and to those who don't give their best this very day.
The best is a progression. It's a process. You build it little by little until it becomes the best work you can possibly deliver. It's not a one-shot thing.
Looking to create the best work of art? Gain mastery by doing lesser works of art in the best way you can.
Looking to write the best book you can possibly write? Write articles, blog posts, and short stories the best possible way right now.
Looking to land the biggest client? Do your best with the smaller clients. Who knows? One of them may refer you to the client you've always dreamed of. It's also your preparation for your biggest presentation.
The best is yet to come. And it always is no matter what stage you are in your journey. You might as well give it your best now.