DALLAS — Dana Loesch has a biblical inscription tattooed on her forearm, a reference to a passage in the Book of Ephesians that calls for Christians to wear holy armor to protect themselves from a dark world. It is an apt precept for Ms. Loesch, a 39-year-old conservative radio talk-show host and political commentator who views the world through a lens of fear and violence.

It is why she has an arsenal of firearms strategically placed in safes throughout her home. She keeps a handgun near her bed in the event of an intruder, she said, which she can use until she finds a more powerful shotgun or rifle nearby. She sometimes tucks a gun in the small of her back. Other times, she keeps a knife in her purse.

“Evil is real,” she said over a plate of barbecued sausage last month in a suburban restaurant.

And if there is a question about what God has to do with any of this, she keeps a sign in the window of the house that she and her family recently vacated. “This home protected by the good lord and a gun,” it read. “If you came here to steal or do harm you might meet them both.”