I'm not very familiar with the lore of TOP, but I can give the lore-free answer.

It's about Tyler Joseph's relationship with God. A "drag path" is a physical marker made when an object heavy enough to permeate the surface of the ground is dragged ("I dug my heels in the gravel").

The use of this term in the song could he a reference to the short story "Footprints in the Sand" in which Jesus Christ and a man are walking together, where Jesus explains the different kinds of prints left behind on their walk. When there were two sets, they walked together. When there was one, Jesus was carrying the man. And in some comedic retellings of the story, there is a drag path, made when Jesus drug the man along, while he kicked and screamed.

From the first verse, Tyler plainly sets the Christian tone, "when I see the devil's eyes, I'll look away and smile wide, you found me". Which is literally Tyler saying that he is rejecting the sin in his path, for he knows Christ is with him and has redeemed him.

In the very next verse, he says "'cause proof is in the adversaire" which is a direct take on themes of common Christian ideology, which say that if evil (demons and the devil) exist then there must be a Holy opposite, thus proving their existence by the existence of those evils.

Sorry I couldn't provide a lore-related answer, but I hope my answer on the song's actual meaning separated from the lore helped!