Indeed the safest road to Hell is the gradual one--the gentle slope, soft underfoot, without sudden turnings, without milestones, without signposts,...Your affectionate uncle, Screwtape.

This line comes from C. S. Lewis’s satirical Christian apologetic work *The Screwtape Letters* (1942), a series of fictional letters from a senior demon, Screwtape, to his nephew Wormwood. Written during World War II and first published in weekly installments, the book uses ironic “infernal” advice to expose how temptation often works in ordinary life. The quoted sentence appears in the closing of a letter where Screwtape counsels that damnation is more commonly achieved through slow moral drift—small compromises, distractions, and habits—rather than dramatic, easily recognized acts of rebellion. The sign-off “Your affectionate uncle, Screwtape” is part of the epistolary frame.

Lewis’s point is that spiritual ruin rarely arrives as a single catastrophic choice; it is more often the cumulative effect of unnoticed concessions. The “gentle slope” suggests a path that feels comfortable and reasonable at each step, precisely because it lacks “milestones” and “signposts” that would force self-examination. By putting the warning in a demon’s mouth, Lewis sharpens the irony: what Screwtape praises as “safe” is safe only for Hell’s purposes. The passage underscores Lewis’s broader theme that the most dangerous temptations are those that normalize apathy, rationalization, and gradual disengagement from conscience and grace.