I’d like to submit that freedom and truth (in this case I would mean the Catholic Church) are opposite sides of the same coin and I’d show why, especially in light of the context of being an ideologue.
Say you want to learn to play the piano. You want to be free to play all sorts of music, jazz, classical ect. So you take it up. You begin to practice and it’s a pain in the *****. You have to learn chords, scales, practice is tedious, the ideology of the piano doesn’t make sense but you want to play so you stay with it. Pretty soon, as you practice more and more you begin to pick it up and it slowly starts to get easier. As you continue to practice, the fundamental stuff, chords and scales become easy and you can almost do it without thinking. You’re learning the ideology of the piano (or the moral law or truths) and before you know it you can do it without thinking. As you continue to practice you’ve incorporated that law into yourself, you’re more or less set free from it because you now do it without thinking and low and behold, you’re free to play all sorts of music. If you didn’t learn the ideology of the piano, you never would have been able to be free to play all the beautiful music you now play.
Paul seems to be saying that to be free and you and I both know I could find passages to support this, you must learn, know and internalize the moral law. Do not use my freedom to indulge in a sinful nature - you bet. Don’t go up and pound on the keyboard of a piano and insist it’s music because as humans we know what music is since it’s written in our hearts.