In addition to his miracles, we get supporting evidences from the human perfection of the person of the Prophet himself; from both the perspective of insight and that of action. The greatest kind of insight is that of knowing Aļļaah, while the greatest kind of action is that of obeying Aļļaah. The greater one’s knowledge of Aļļaah and one’s obedience to Him, the more perfect one will be as a human being. We can also consider the level of strength of these two perspectives of human perfection. The first level would be to apply them to oneself. The higher level would be the strength to help others achieve high levels of insight and action.
Now, consider that at the time of the Prophet’s appearance, the world was full of blasphemy and vice of great varieties. As for the Jews, they had drowned in anthropomorphic beliefs, perverting the books brought by prophets, and even showing enmity towards some of them, like Jesus. The Christians, on the other hand, were fumbling in the fog of self contradictory superstitions, such as their beliefs in the trinity, the father and the son, along with the belief that creator and created are united. Others, like the Magians, were allowing men to marry their mothers, while the Arabs were busy with robbery, kidnapping and worshipping idols.
After the Prophet’s appearance (صلى الله عليه وسلم) these blasphemies and vices were replaced by the belief in the Oneneness of Aļļaah and obedience to Him at an unprecedented scale. This reversal from blasphemy and vice is the greatest achieved by any prophet in history, much greater than that of previous prophets, such as Moses or Jesus.
Look for example at his own people, the Arabs. Before his call they were split into tribes, clans and families with ongoing conflicts and enmity. After their embracement of Islam they became united to defend the Prophet and his teachings, emigrated from their lands, left their families and sacrificed their blood in his cause, making themselves targets for the blows of swords and the strikes of arrows. All this to strengthen the Prophet’s call, and nothing else. For he offered them no ease in this world, no riches as compensation, and no immediate benefits as incentive, no kingdom, no rule, no worldly titles. On the contrary, many spent their riches to support him and embraced poverty and a life of obeying orders.
This tells us, in addition to miracles, that the Prophet Muĥammad is not only a prophet, but the greatest prophet of all. He was supremely successful as a political leader and in his influence on the personalities of his followers. This influence and its intensity is still very evident today for anyone comparing Muslims and non-Muslims in terms of whom they are influenced by and to what extent.