His life and honesty bears testament to his Prophethood
The Qur'an mentions Muhammad's (PBUH) Prophet Hood (Surah 33:40):
Prophet Muhammad (PBUH) mentioned that he was The Last Prophet and Last Messenger. He was known to be truthful even before his claim to Prophethood.
"Muhammad (peace be upon him) was a deeply honest man, known even before prophethood as Al-Amin, the Trustworthy. The Qur'an says, ‘And indeed, you are of a great moral character' (Surah Al-Qalam, 68:4). People in Mecca trusted him with their valuables, and he never lied, even when it cost him—his enemies couldn't deny his truthfulness. When he spoke of Allah, they knew he meant it.
Jesus (peace be upon him) brought truth too—‘We gave him the Injeel, in which was guidance and light' (Surah Al-Ma'idah, 5:46)—and Muhammad's honesty perfected that legacy. The Qur'an says, ‘The Messiah, son of Mary, was no more than a messenger' (Surah Al-Ma'idah, 5:75). His integrity—returning trusts, keeping promises—mirrored Jesus' call to worship Allah alone, showing Allah's message thrives on a foundation of truth."
The argument that Muhammad's personal virtue (Al-Amin) validates his prophethood is sentimental nonsense. Personal honesty, achievable by any man, cannot substitute for the absolute proof required for divine revelation.
1. Honesty Is Not Sinlessness
The standard for the ultimate messenger is absolute perfection, a test Muhammad fails. Jesus Christ is the singular, sinless Son of God (Hebrews 4:15), whose perfection justifies others (2 Corinthians 5:21). Muhammad, by the Qur'an's own command, had to seek forgiveness for his sin (Surah Ghāfir, 40:55), disqualifying him from infallibility.
2. Integrity Must Extend to Revelation
The ultimate test is the integrity of the message, not the man's word on valuables.
Christians agree that human virtue cannot produce divine revelation or rewrite the testimony of the Son of God.