And at first, indeed, that deceitful and lawless one, with crafty deceitfulness, will refuse such glory; but the men persisting, and holding by him, will declare him king. And thereafter he will be lifted up in heart, and he who was formerly gentle will become violent, and he who pursued love will become pitiless, and the humble in heart will become haughty and inhuman, and the hater of unrighteousness will persecute the righteous. Then, when he is elevated to his kingdom, he will marshal war; and in his wrath he will smite three mighty kings—those, namely, of Egypt, Libya, and Ethiopia.
And after that he will build the temple in Jerusalem, and will restore it again speedily, and give it over to the Jews. And then he will be lifted up in heart against every man; yea, he will speak blasphemy also against God, thinking in his deceit that he shall be king upon the earth hereafter for ever; not knowing, miserable wretch, that his kingdom is to be quickly brought to nought, and that he will quickly have to meet the fire which is prepared for him, along with all who trust him and serve him.
For when Daniel said, “I shall make my covenant for one week,” he indicated seven years; and the one half of the week is for the preaching of the prophets, and for the other half of the week— that is to say, for three years and a half— Antichrist will reign upon the earth. And after this his kingdom and his glory shall be taken away. Behold, you who love God, what manner of tribulation there shall rise in those days, such as has not been from the foundation of the world, no, nor ever shall be, except in those days alone. Then the lawless one, being lifted up in heart, will gather together his demons in man's form, and will abominate those who call him to the kingdom, and will pollute many souls.
Source: The End of the World (Pseudonymous) (New Advent)