Hezekiah's reign marked a dramatic shift in national policy, pivoting entirely away from the strategies of his father, Ahaz. Ahaz had chosen a path of submission to the Assyrian empire, paying heavy taxes and subjugating himself to foreign rule to be saved from his enemies. He had even gone so far as to declare himself a servant and son to the Assyrian king. Hezekiah, however, chose a completely different path, placing his absolute trust in God [מלבי״ם, ביאור שטיינזלץ, רד״ק].
His rebellion against Assyria was therefore not a violent uprising, but rather a firm end to this inherited servitude. Hezekiah simply refused to accept Assyrian authority, stopped the payment of taxes, and replaced dependence on a foreign power with absolute trust in God alone [רלב״ג, רד״ק, ביאור שטיינזלץ]. Because of this profound devotion, God was constantly present with Hezekiah [מלבי״ם]. This divine companionship served as a direct reward for the king's faithful actions [רלב״ג].
As a result of this divine backing, Hezekiah experienced great success in his endeavors. The primary approach among commentators notes that his achievements were so remarkable that people naturally viewed him as a leader operating with extraordinary wisdom and intelligence [מצודת דוד]. Another perspective, however, highlights that his success was indeed the product of actual caution and sharp mental agility. According to this view, even though Hezekiah knew God was with him, he never simply relied on miracles. Instead, he acted with deep deliberation, carefully examining every detail with his intellect before making a move [חומת אנך].