The presence of God

In traditional Catholicism you need the guidance of the magisterium to steer clear of damnable error. The claim is circular since the damnable error is dissenting from Catholic theology.

By contrast, Protestant theologians appealed to the internal testimony of the Holy Spirit as a kind of epistemological shortcut. To Catholic theologians that's an ac hoc appeal, but here's a sophisticated defense:

https://www.proginosko.com/2017/01/the-internal-testimony-of-the-holy-spirit/

You also have charismatics who claim to have up-to-the-minute guidance from God. So that's another paradigm, a flawed paradigm, though no less flawed than the Catholic alternative. In addition, "the presence of God" is invoked very loosely in popular and/or folk theology. 

On a different, but related note, some Christians say they've had an unmistakable experience of God's presence. Likewise, some unbelievers say they had the same kind of experience, which was instrumental to their Christian conversion.

Unlike the loose use of the term, this refers to something overwhelming and undeniable for the person who had it. Not a visual or auditory apparition, but nevertheless a powerful, transformative encounter with God. I'm certainly not vouching for every claimant, although I think it's undoubtedly the case that God has manifested himself to some Christians or converts to Christianity in that way.

Now some paradigms I outlined conceive of divine guidance in terms of specific ongoing directives. They view the Christian pilgrimage like a dark, narrow, winding mountain road where drivers can easily veer off on either side and plunge to their death hundreds or thousands of feet below. To make it safely to heaven, you need the road to have street lights at regular intervals. Somewhat parallel to this is the charismatic belief that God gives his people signs on a regular basis. 

The presumption of the traditional Catholic paradigm is that because there are so many different ways to be damned, we need regular up-to-date warnings every step of the way. One swerve and you hurtle down the cliff. 

Of course, Protestants believe God gave us a roadmap in Scripture, and the roadmap doesn't need to be updated every year. 

But in addition to that, suppose a Christian who's at the end of his tether has an unmistakable experience of God's presence. That gives him timely confirmation that he's still on the right path. So he doesn't need to be constantly shown that he's on the right path. Rather, if he strayed, if he was now on the wrong path, he wouldn't have that confirmatory experience.

So that reverses the presumption. You're going in the right direction unless you have a sign that tells you you took a wrong turn. It's not like GPS where you're shown at every juncture which turn to make. You can read a roadmap for yourself. At best, you only need to be warned if you're about to take a wrong turn–or assuming you already got off course, have an indication of how to get back onto the right path. 

Now I'm not suggesting that most Christians experience God in that dramatic fashion. I'm just pointing out that not every Christian has the same experience. God is sovereign. And divine direction can take different forms. Scripture is fundamental. But God guides his people through the providential orchestration of events. And occasionally in more direct, individual forms. A Magisterium isn't the only paradigm.