When his uncle...
When his uncle, Abu Talib conveyed to him the message of the Quraysh, saying that they were willing to select him their king, to give to him in marriage the most beautiful daughter of the tribe and make him the most wealthy member of their society, provided he gave up his preaching's, the Holy Prophet said in reply that he was not going to budge an inch from his sacred mission even if they put the sun in one of his hands and the moon in the other.
Just as infallibility is a necessary outcome of a Prophet's communication with Allah, similarly sincerity and firmness are also the essential characteristics of Prophethood. (v) Constructiveness: The Prophets harness all the forces at their disposal and set them in motion for constructive purposes, that is to reform both the individual and society or in other words, to ensure human welfare. It is impossible that their activities should corrupt any individual or cause harm to society at large.
Therefore if the preaching's of a claimant of Prophethood lead to corruption or indecency, paralyze human power or cause decline of society, that is clear proof of his being an imposter. Dr Iqbal in this connection has very aptly said: "Another way of judging the value of a Prophet's religious experience would be to examine the type of manhood that he has created, and the cultural world that has sprung out of the spirit of his message". (The Reconstruction of Religious thought in Islam, p.
The message of only those who preach these principles is worth consideration and they alone can be asked to produce a proof or a miracle. If the message preached by a person contains an element indisputably unreasonable or contrary to the principles of monotheism and justice, or supporting tyranny, then it is not worth consideration at all. In such a case it is absolutely unnecessary to ask him to produce a proof of his claim.