Isaiah 39:5

Hear the word of the Lord Isaiah's tone is threatening, because he sees in this thing a sin against Jehovah. It was not necessary to specify wherein the offence consisted; king and prophet understood each other perfectly. The reception of an embassy from the sworn enemy of the king of Assyria was in itself an act of rebellion likely to precipitate a conflict which Isaiah strove to avert; and the childish vanity displayed by Hezekiah, his pride in earthly resources, and his readiness to enter into friendly relations with the powers of this world, were tendencies against which Isaiah's ministry had been a continuous protest. All these tendencies sprang from a single root, the lack of that absolute faith in Jehovah as the all-sufficient guide and protector of the nation which was the fundamental article of Isaiah's political programme.