To be happy and content in engaging in the material, self exploration and discovery. I’ve found personally, but I think is also generally true, there’s a corrupting element to wanting something else and using the “it” (creative endeavor) to get that thing that you want.
It might work as motivation and probably ultimately get you what you want and accomplish the endeavor but the fuel might not burn clean. Maybe you want success, validation, money, control, power, influence. Or maybe you want to alleviate insecurity, self-doubt, or prove something. Or even if it’s something like provide for your family, give back, realize your full potential.
There are degrees to which the fuel doesn’t burn clean. Meaning this kind of fuel might produce waste products like frustration, discontent, resentment, guilt, lack of fulfillment, narcissism, jealousy, competition, etc…
The cleanest fuel might be to create for the sake of creation without any expectations or external dependencies or motivations. Create for the sake of giving and generosity.