As for the brothers of trust...

As for the brothers of trust, they are like the hand, the wing, the kin and the money to you. If there is trust between you and your brother, you give him from your money, help him with your hand, make friends with his friends, be enemy to his enemy, keep his secrets, support him and show his good qualities. O asking man, know that brothers of trust are rarer than the red sulfur. And as for the brothers of smile, you get your pleasure from them.

Do not cut your relation with them and do not ask them for more from their consciences. Smile at them and be courteous to them as long as they do that to you.’[^5] Imam Ali had studied the psychology of the society and known the interiors of the selves and their intentions and tendencies and then he gave alive pictures on all the social sides such as friendship among people. He analyzed friendship in a real analysis that did not differ throughout history and ages.

His Narrations From Imam As-Sadiq He narrated from Imam as-Sadiq (a.s) a tradition that once, a man had asked his father some questions and he answered by saying, ‘…Say to them: was there any contradiction in the knowledge of Allah that the Prophet (a.s) had divulged? If they say ‘no’, then you would say to them: Does he, who legislate a verdict having contradiction, contradict the messenger of Allah? They will say “yes”. If they say “no”, they will contradict their first saying.

You would say to them: (but none knows its (the Qur'an’s) interpretation except Allah and those who are firmly rooted in knowledge) . If they say: who are those who are firmly rooted in knowledge? You would say: It is he whose doings have no contradiction. If they say: who is he?

You would say: it was the messenger of Allah (a.s)…if the messenger of Allah had not appointed a successor after him, he would have wasted those who would be the successors after him…he asked, ‘does the Qur'an not suffice you?’ He said, ‘Yes, if they find an interpreter to it.’ He asked, ‘Have the messenger of Allah not interpreted it?’ He said, ‘Yes, he have interpreted it to one man and declared to the nation the position of that man.

It was Ali bin Abu Talib…a muhkam[^6] is not two things but one thing.