This essay examines the tradition of ‘doubting’ poetics through an assessment of selected nineteenth- and twentieth-century sonnets. Through considering recent work on Victorian literature and culture, it argues for the importance of the poetics of faith in this period, and assesses the presence of nineteenth-century Christian, and particularly Anglican, forms and concepts in the genre of the sonnet. Analysing later twentieth-century sonnets by Geoffrey Hill and Carol Ann Duffy, it suggests that the sonnet remains vitally linked to the literature of faith and that these sonnets have vital links to their Victorian predecessors.