Courage is not simply one of the virtues, but the form of every virtue at the testing point, which means, at the point of highest reality.
What it means
Courage isn’t one virtue among many. It is the shape every other virtue takes when it is put to the test, the point where it stops being an intention and becomes real.
The next line makes it concrete: honesty or mercy that gives way under danger was only ever honest or merciful “on conditions.” Without courage, the other virtues hold only while they are safe.
The context
The Screwtape Letters, first published in February 1942, is a series of letters from a senior devil, Screwtape, to his nephew Wormwood, a junior tempter working on a British man known only as “the Patient.” Lewis dedicated it to J. R. R. Tolkien, and warns in his preface that “the devil is a liar. Not everything that Screwtape says should be assumed to be true even from his own angle.”
In this letter the patient’s town is about to be bombed, and Screwtape is weighing whether to make him a coward. He admits the danger is risky for the devils: danger forces “the undisguisable issue of cowardice or courage.” It is God, he says, who “sees as well as you do” that courage is the form of every virtue at the testing point, and he adds: “Pilate was merciful till it became risky.”
Why it matters
It explains why courage matters even for people who never face physical danger. Every value we hold gets tested eventually, usually in small ways: the honest answer that might cost a sale, the kind word that might cost face.
Lewis’s line is a good question to ask about any virtue you think you have: does it hold when it’s risky? If not, it’s a preference, and courage is what turns it into a principle.
About C. S. Lewis
British author, literary scholar and lay theologian, 1898–1963
Clive Staples Lewis was born in Belfast on 29 November 1898. He taught English literature at Magdalen College, Oxford, from 1925 to 1954 and at Magdalene College, Cambridge, from 1954 until his death on 22 November 1963. A close friend of J. R. R. Tolkien, he was part of the informal Oxford literary group known as the Inklings.
He is best known for The Chronicles of Narnia, and also for The Screwtape Letters and his non-fiction Christian writing, such as Mere Christianity. He lost his faith as a teenager and returned to Anglicanism at 32, and his wartime radio talks on Christianity brought him wide acclaim. He wrote more than 30 books, translated into over 30 languages.
The source, and how we checked it
It comes from The Screwtape Letters, Letter XXIX, 1942.
The full passage:
He sees as well as you do that courage is not simply one of the virtues, but the form of every virtue at the testing point, which means, at the point of highest reality. A chastity or honesty, or mercy, which yields to danger will be chaste or honest or merciful only on conditions. Pilate was merciful till it became risky.
The book is still in copyright, and no published edition could be opened online, so we checked the words against a retyped copy of the book that Alfred supplied, in Letter XXIX. The letters are written by Screwtape, a devil, to his nephew; "He" in the full passage is God, whom the devils call "the Enemy". We start the quote at "courage" and capitalise it. We last checked this on 7 November 2026.