Luther's merit in literary history is of the greatest: his dialect became the language of all writing. They are not well written, these Four-and-twenty Quartos of his; written hastily, with quite other than literary objects. But in no Books have I found a more robust, genuine, I will say noble faculty of a man than in these. A rugged honesty, homeliness, simplicity; a rugged sterling sense and strength. He dashes out illumination from him; his smiting idiomatic phrases seem to cleave into the very secret of the matter. Good humor too, nay tender affection, nobleness and depth: this man could have been a Poet too! He had to work an Epic Poem, not write one.
— THOMAS CARLYLE