Lars Levi Laestadius (1800-1861) was active as a priest in the Swedish church in the northernmost parts of Sweden. After experiencing a transformative and life-changing spiritual breakthrough, which he himself has later called his rebirth and the moment when he received a living faith, he came to gather large audiences and give rise to a revival movement, which still bears his name today. Although Laestadius was active as a priest, he sharply criticized many conditions in the contemporary church. The purpose of this essay has been to investigate whether, and if so how, this criticism as presented in his sermons and writings can be linked to his Bible use, i.e. his reading and interpretation of the Bible and the authority he gives the Bible. For my study, I have closely read a large number of his extant sermons and published writings. The study also briefly summarises the central elements of Laestadius' theology, as well as what he perceives to be the Church's main mission. The study shows how his criticism is based on his use of the Bible and also how, through a far-reaching allegorical interpretation of the Bible, he uses different texts from both the Old and the New Testaments in his argumentation.