Working hard at your craft is not the same as working toward growth. Working toward growth means taking big scary chances with your art and risking failure.
From the moment it's available, ideally, from the moment you begin, don't think of your art as your creation. Think of yourself as the caretaker. You simply helped the work along...
The best painters connect passionately with whatever is in front of them (or inside) and their art flows from that passion.
Your art is the biggest impediment to creating your art.