But we're not just Biblical illiterates.

We're also terribly illiterate in philosophy (the substantial kind), metaphysics, logic, rational inquiry, Church history (real vs. what gets picked up in the ether here...e.g., the Crusades, the Inquisition, the real details of Galileo, the Reformation, prior actual heresies), and bioethics.

We're really illiterate in what the Church actually teaches about marriage, conjugal union, etc...and, of course, the Sacraments, and grace, and sin, and the universal call to holiness (see Vatican II).

We have people here who pretend to be Vatican II fans, but draw a blank when the universal call to holiness and apostolate is mentioned!

They reject the fact that we all are called to do apostolate, every day, like the beating of our heart (as a modern-day saint said). 

Holiness?  What's that?
Apostolate?  What's that? 

Heresies get repeated all the time because so few know what was teased out before.