Perveniri ad summa sine industria non potest QUINTILIAN

This is an example sentence in Kennedy’s Primer. It is meant to illustrate the use of certain impersonal verbs with an impersonal infinitive. I was wondering why perveniri is passive, but perhaps I have answered my own question because that is just the way Latin is. I would have written pervenire, but then again, my Latin’s not as good as Quintilian’s. I would welcome any references to other grammars.

Here you are.

Impersonal Verbs
Meagan Ayer, Allen and Greenough’s New Latin Grammar for Schools and Colleges. Carlisle, Pennsylvania: Dickinson College Commentaries, 2014. ISBN: 978-1-947822-04-7.
https://dcc.dickinson.edu/grammar/latin/impersonal-verbs

Thank you kindly. That is most helpful.