How and why do the nobles change their opinion of arthur The Sword In The Stone?

In "The SWord in the Stone," the nobles initially view Arthur as an unremarkable and lowly boy, dismissing him due to his humble origins. However, their opinion shifts dramatically when he successfully pulls the sWord from the stone, proving his worthiness and rightful claim to the throne. This act not only demonstrates his exceptional strength and destiny but also challenges the established social order, compelling the nobles to recognize his potential as a true leader and king. Ultimately, Arthur's ability to unify them under his rule marks a significant turning point in their perception of him.