Sabugal emphasizes that "I believe" (singular) expresses both the "justifying faith" and the "saving confession" of the individual who has heard the Word. The Creed as a 'Symbol':
Credo: La fe de la Iglesia by Santos Sabugal is an exhaustive, 1,189-page theological treatise first published in 1986. It is widely regarded as an essential academic and catechetical resource that analyzes the "Symbol of Faith" (the Creed) through both a historical and interpretive lens. Librería Renacer Core Themes and Analysis Historical Evolution credo+la+fe+de+la+iglesia+santos+sabugal+quotes+pdf
The Creed, Tradition, and the Witness of the Saints and the Witness of the Saints