Imam al-Kazim (as): Imam al-Kazim (as) in his advice to Hisham b. al-Hakam, said, ‘Allah has only sent His prophets and messengers to His servants in order that they may come to an understanding of Allah, so the ones who best heed their call are those who have the best inner knowledge, and the ones who best know Allah’s command are those who have the greatest intellects, and those who have the most perfect intellects will be the ones with the highest status in this world and in the Hereafter.’ al-Kāfī