This text presents a critical analysis of the concept of "orthodoxy" (orthé doxa) and its relationship to the authentic understanding of faith within the Christian context. The author argues that interpreting faith merely as an opinion, a set of beliefs, or theoretical knowledge constitutes a fundamental misunderstanding of Jesus’ original message. Drawing on biblical exegesis, particularly the work of Gerhard Ebeling and the investigation of the hypothetical Q source, the text demonstrates that Jesus’ conception of faith was rooted in practical conduct and a fundamental life attitude rather than dogmatic correctness. In this sense, faith does not represent intellectual assent to specific propositions (doxa or episteme), but rather a primary will to do "what is right." The author also highlights the linguistic difficulties involved in translating Aramaic concepts into Greek terminology (pistis, aletheia), which caused a shift from a dynamic existential orientation to the static holding of opinions. The essay aims to rehabilitate faith as a vital existential practice.