7 Be quiet, O you that exalts yourself; vaunt not yourself! For if your wealth has lifted up your heart, it is not more abundant than that of Hezekiah, who went in and boasted of it before the Babylonians, (yet) it was all of it carried away and went to Babylon. And if you glory in your children, they shall be led away from you to the Beast, as the children of King Hezekiah were led away, and became eunuchs in the palace of the King of Babylon. And if you glory in your wisdom, you do not in it excel the Prince of Tyre, whom Ezekiel reproached, saying unto him:— Are you wiser than Daniel, or have you seen by your wisdom the things that are hid? And if your mind is puffed up by your years, that they are many; they are not more in number than those of the Prince of Tyre who ruled the Kingdom during the days of twenty-two Kings of the house of Judah, that is, for four hundred and forty years.
And since the years of that King of Tyre were many, all the time he thus said in his heart, I am God and sit in the seat of God in the heart of the seas. But Ezekiel said to him: You are a man and you are not God. For while the Prince of Tyre was walking without fault in the midst of the stones of fire, there was mercy upon him. But when his heart was lifted up, the cherub who overshadows, destroyed him.
Source: Demonstrations (New Advent)