This is the 28th most frequent Icelandic word.
vera
"Vera" means "to be" in English.
In this sentence, 'vera' is used in the construction 'er að' to indicate the present progressive action of going to the library.
Ég er að fara á bókasafnið.
I am going to the library.
Here, 'vera' functions as the infinitive verb 'to be,' describing the state of becoming a teacher.
Hann vill vera kennari.
He wants to be a teacher.
In this use, 'vera' is part of the infinitive phrase that expresses the necessity of being honest.