The Imam is unique in his age in the sense that no one can attain his rank.

The Imam is unique in his age in the sense that no one can attain his rank. No scholar can come within range of his knowledge and he is unequalled in all his qualities. He possesses all virtues and worthy attributes without any striving on his part and he is adorned with all lofty characteristics. This is a great gift bestowed on him by God in His generosity." ( 1 ) ( 1 ) al-Kulayni al-Kafi Vol. I p.200.…