What is the significance of the titles of the episodes?

The title of each episode of the series Warrior Nun comes from a book of the Bible. Some of the titles can plausibly be connected to the events of the episode, such as the title of the first episode, Psalm 46:5:

God is within her, she will not fall;

God will help her at break of day.

If one squints a bit, this could describe God not letting Ava die, and her receiving the Halo.

However, some are more obscure. For instance, the fourth episode is titled Sirach 26:9-10:

By her eyelids and her haughty stare an unchaste wife can be
recognized.

Keep a strict watch over an unruly wife, lest, finding an
opportunity, she make use of it;

There are not any wives in this episode, chaste or otherwise (except perhaps Dr. Salvius?). Nor is it immediately clear who might have a haughty stare, or be unruly.

So what is the significance of the episode titles?