We know that the position of prophethood is the biggest position which is given to pure people because most other positions rule over the bodies of people. Prophethood is a position that rules over the souls of the society. Therefore, there are many people who falsely claim prophethood because of the high stature of the position – they want to misuse the position.
Then, people must either accept every claim that is made or reject every claim that is made. It is clear that this would cause anarchy. If none are accepted the result would be misguidance and digression.
Therefore, the same proofs for the necessity of prophethood itself says that true prophets must have a sign with them separating them from those who falsely claim prophethood and giving them evidence proving their truthfulness.
Along these lines it is necessary for every prophet to perform a miracle bearing testimony to their truthfulness.
As is understood from the Arabic term for miracle mu’jazah, the Prophet (s) must have the ability to perform something that is extraordinary – that which others are incapable of performing.
A prophet who has a miracle must invite the people to perform a similar miracle. He must introduce his sign so that if others cannot perform it, it will be called tahaddī.
