Creativity is the cognitive capacity to produce something that wasn't there before, that is also worth having. Not a personality trait you were issued at birth, but a function of three independent components, each individually developable, jointly necessary.
Intake: the body of material your generative process can actually reach for at the moment of generation. Processing style: how readily you connect across categories, how long you can hold the unresolved, and how fluently you deploy operations on what you've reached for. Depth of operation: which layers of cognition your work is actually traversing, and how cleanly.
The weakest component caps the whole output, regardless of how strong the others are. Most stuck creators are stuck on the wrong one. The essay below names the components, audits which is yours, and includes an appendix-level schematic for the reader who has worked the broad strokes for years.