Lewis’s satirical approach brilliantly highlights how easily believers are distracted by mundane realities, worldly concerns, and superficial spirituality, forgetting their true spiritual destiny.

In his 64-page fiction, C.S. Lewis satirises the world of evil through the conversations and letters shared between two demons, employing irony, wit, and an imaginative inversion. Screwtape, a chief demon, is a more experienced senior worker of darkness, while Wormwood, his nephew, is still green in the business of being a villain—still rough around the edges. The former sends letters to the latter, counselling, guiding, and mentoring him on how to not only rise but thrive in the career of evil—thus the name Screwtape Letters. Through these two characters, Lewis provides a striking commentary on temptation, sin, and spiritual warfare.

Lewis structures the narrative as epistolary fiction, using brief, engaging letters that deepen in theological and moral complexity. Each of the 31 letters tactically targets everyday human vulnerabilities, cleverly highlighting spiritual truths through Screwtape’s distorted yet insightful perspective.

Temptation, Sin and Spiritual Warfare

Lewis’ commentary on temptation is seen when Screwtape advises Wormwood to keep his patient (the human being tempted) focused on surface-level distractions. “It is funny how mortals always picture us as putting things into their minds,” writes Screwtape. “In reality, our best work is done by keeping things out.” This reminds us that we are fallen by nature; even before the devil tempts us, we are already predisposed to evil. Conversely, the demons work against thoughtful reflections about God, so that we may not obey the great command of loving him with all our mind (Matthew 22:37). God speaks through nature and the Bible, and the devils will work overtime to distract us from our Creator’s words.

On sin, Lewis chillingly notes its incremental power. He writes, “The safest road to hell is the gradual one—the gentle slope, soft underfoot, without sudden turnings, without milestones, without signposts.” Thus, Lewis helps readers reflect on the total depravity and the deceitfulness of sin (Hebrews 3:13). The book illustrates how sin rarely appears in dramatic form but often gains ground through unnoticed compromise, echoing Romans 1:21–25, where sinners “exchanged the truth about God for a lie.”

More people will go to hell because of envy than because of murder. It is indeed true what John Owen warned: “Be killing sin, or sin will be killing you.” The seemingly small sins—the “little foxes that spoil the vineyards” (Song of Songs 2:15)—the lies, those lustful glances, the prideful self-aggrandisement, and the whispered gossip are evil not because there are no such things as greater sins, but because of whom they sin against (Habakkuk 1:13).

In spiritual warfare, Lewis exposes Satan’s tactic of diverting believers from obedience to seeking God’s acceptance through works. Screwtape writes, “Keep his mind off the most elementary duties by directing it to the most advanced and spiritual ones…aggravate that most useful human characteristic, the horror and neglect of the obvious.” This reflects God’s word to Saul that “to obey is better than sacrifice” (1 Samuel 15:22); Paul’s warning that “if I speak in the tongues of men and of angels but have not love, I am only a resounding gong or a clanging cymbal” (1 Corinthians 13:1); and James’s command to “be doers of the word, and not hearers only” (James 1:22).

The timing of good works is crucial to our understanding of the gospel. The Christian is not accepted because of what he does, but because of what Christ has done. Therefore, the believer’s obedience and works of love are not an attempt to earn God’s love, which is legalism. They are a grateful response to the love already secured by grace. Lewis warns us that the enemy exploits this foundational gospel truth.

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