Just to add to that, "invented" might give the wrong idea. "Revival" is more accurate. It wasn't used in the day to day, and making it useful that way took some work. But it wasn't invented from nothing.
In particular, if you know modern Hebrew, you can mostly read the ancient Hebrew in the bible, which shows it is not truly a new language.
"The major result of the literary work of the Hebrew intellectuals along the 19th century was a lexical modernization of Hebrew. New words and expressions were adapted as neologisms from the large corpus of Hebrew writings since the Hebrew Bible, or borrowed from Arabic (mainly by Eliezer Ben-Yehuda) and older Aramaic and Latin. Many new words were either borrowed from or coined after European languages, especially English, Russian, German, and French."
In particular, if you know modern Hebrew, you can mostly read the ancient Hebrew in the bible, which shows it is not truly a new language.