Matthew 16:17

Jesus' beatitude to Peter — 'blessed art thou, Simon Bar-jona: for flesh and blood hath not revealed it unto thee, but my Father which is in heaven' — identifies the christological confession not as a human intellectual achievement but as a divine gift, placing the Petrine confession within an epistemological framework that anticipates Paul's doctrine of the internal testimony of the Spirit (1 Corinthians 2:10–12). The phrase 'flesh and blood' (sarx kai haima) is a Semitic idiom for human perception and human capability, drawing a sharp boundary between what human reasoning can achieve and what divine revelation accomplishes. The patronymic 'Bar-jona' (son of Jonah/John) has been variously interpreted as biographical detail or as a symbolic connection to the prophet Jonah whose sign Jesus has already invoked (12:40). The verse grounds Petrine authority in charismatic reception rather than ecclesiastical appointment, complicating both Protestant and Catholic appeals to the passage.