Nineteenth sign:

The previous signs proved that Muhammad is the Messenger of God Almighty. With his Messengership evident from thousands of decisive proofs. Prophet Muhammad is the brightest sign and the most definite evidence of God's Oneness and [the existence of] eternal happiness. Here we give a very brief description of this radiant sign this truth‑speaking evidence. Since he is the evidence through which the knowledge of God is acquired we must recognize both the evidence and the way it acts as evidence.

God's Messenger like every other being is personally a proof of God's Existence and Unity. Moreover he is the one who announced this truth in his own words and those of all other creatures. We now point out in essentials how evident upright and truthful this proof is.