The fulfillment of a divine promise often brings about a profound personal transformation. Upon arriving at the hill and encountering a group of prophets, Saul experiences the culmination of the third and most elevated sign he was given. The primary approach among commentators is that this event marks a sudden and complete shift, elevating him to a new spiritual height. He does not merely observe the group; he actively joins their ranks and begins to prophesy alongside them as an equal [ביאור שטיינזלץ].
The spiritual impact of this moment carries a dual purpose. The Spirit of God that rests upon him grants him not only the gift of prophecy but also a profound sense of divine courage and heroism [מלבי״ם].
What makes this transformation truly remarkable is its abruptness. Saul has no prior training or preparation for such an advanced spiritual state, nor does he come from a prophetic lineage. Because of this complete lack of background, his sudden ability to prophesy sparks immense astonishment and wonder among all his acquaintances who witness his new reality [אברבנאל].