In the context of ancient Rome, my understanding is that a lot of lower class people were enslaved, and in order to climb up and become a free person, quite an amount of hard work, learning, and luck would be required. Therefore, in knowledge there is not only truth, but also personal salvation (to escape slavery). Francis Bacon said ipsa scientia potestas est. There is also the saying of ex scientia vera. Maybe ipsa scientia libertas (vel liberatio) est or in scientia libertas (vel liberatio) can be a translation of "in knowledge, liberation". What do you think?