Ramon Llull, Ladder of the Intellect, Liber De Ascensu Et Decsensu Intellectus, 1512
For the atla Pines headcanons, Stanley's firebending powers would be very connected to his emotions and would be harder to control if he was feeling really excited or angry, but when his thoughts and emotions are in sync he can do a whole lotta damage. Ford meanwhile would have little to no trouble with the precise parts of firebending and can easily control his powers (focus on your intellect). They are almost equal in their abilities. On a good day Stanley could beat Ford, and vice versa.