Agility requires humility
Humble attitude is useful on many levels. For an agile mindset it’s pretty much paramount. The reason - everything is so transparent. Things are visible. There is nowhere to hide and no way to delay showing your incremental achievements. Other people regularly see the results of your work and offer feedback. They peruse your stuff, give you a different perspective, point out mistakes. If all of that makes you clench your teeth, you are in trouble. One has to stay humble and willing to consider many points of view. Agility requires humility.