Imamate (Divinely Appointed Leadership) is a very high position, and it is only Allah who can decide who is qualified for it. And if the Prophet Muhammad (S) announced to the people that the Twelve Imams are the leaders, or that the Ahlul Bayt are the people that we must refer to, or in that Imam Ali is his successor, it was only because he was asked...
...Then she was most happy feeding you forgetting her own hunger; clothing you, even ...
Forty Traditions from Imam Ali (as)
His Supplication when he Looked upon Clouds and Lightning and Heard the Sound of Thun...
The Holy Prophet performed various miracles, the commentaries upon which are recorded...