In order to investigate the stylistic transformation that occured before Bruckner abandoned the composition of Masses, this paper analyzes the Credo settings in his last three great Masses, with special attention to the treatment of the text. The relationship between the text and specific musical techniques is also considered. The trends found in these three works, especially in the last setting in F minor, confirm the assumption that Bruckner's Mass composition served as a transition to the composition of his symphonies.