Hadith 11

And he-asws said: ‘The intellect is two (types of) intellects – a natural intellect and an intellect of experimentation, and each of these leads to the benefit and the owner of the intellect and the religion can trust with it. And the one who loses the intellect, so the capital of his wealth is the disobedience; and a friend of every person is his intellect, and his enemy is ignorance; and the intellectual isn’t the one who recognises the good from the evil, but the intellectual is the one who recognises the better of the two evils. And gatherings of the intellectuals increase in the nobility; and the perfect intellect is a subdues of the evil nature; and it is upon the intellectual that he counts against himself its sameness in the religion, and the opinion, and the manners, and the etiquettes, so he gathers that in his chest, or in a book and acts during its decline’’. [10]