This essay critiques the definitions of πίστις (faith) in Hebrews 11:1 through an epistemological lens. Three interpretations—ontological foundation, psychological assurance, and legal title—are examined and found lacking. The ontological definition is circular; psychological confidence detaches from evidence, risking irrationality; and the legal definition assumes outcomes without verification. Each falls short of rational epistemology’s standards, suggesting that an accurate understanding of πίστις must link belief with adequate evidence to avoid poor decision-making.