What is the most overlooked topic/concept in Catholicism/Christianity that is overlooked by most Catholics/Christians today?

I recently thought of something. The Bible talks about “prophesying” and defines it as what “upbuilds, edifies, encouraging, and comforting”. It made me think that an often overlooked concept present throughout the literally entire Bible is this: “Mankind is not meant to decide for itself good and evil. Mankind is meant to voluntarily decide to discern, participate , and know God’s divine will. Any topics you can think of or concepts would help to see other perspectives!