Imam Jafar bin Muhammad had two kinds of different behavior towards the rulers, especially towards Mansour Abbasi; these two seem to be contradicting each other. He would sometimes talk nicely to him, trying to justify himself and he would sometimes treat him roughly.
He would talk calmly sometimes and he seemed to be asking Mansour to believe him. For instance, “I swear I did not do that and I do not think that anyone should do something like that. I do not believe in it and I am obedient of you all the time. I am old and weak. You can even keep me in your prisons if you want until I die, which will happen soon.”
On another occasion he sends this message to Mansour, “If you do not stop annoying us, I will curse you five times a day.” There are other reactions similar to this.
Why did Imam Sadiq treat Mansour like this? Which of these two behaviors people should take as an example?
A. Principle of Precaution (Reservation)
‘Precaution’ is one of the important principles in the beliefs of the Shia.
According to Shaikh Mofid, “Precaution means to hide what is right and to hide one’s beliefs from the enemy and even to support the enemy in what is harmful both for the religion and for one’s life. This is obligatory to be carried out whenever we are sure that it is crucial and it is not obligatory to be done if we are not sure that it is crucial.”
There are four reasons for precaution. According to Qur’an,“Let not the believers Take for friends or helpers Unbelievers rather than believers: if any do that, in nothing will there be help from Allah, except by way of precaution, that ye may Guard yourselves from them. But Allah cautions you (To remember) Himself; for the final goal is to Allah.” (Al ‘Imran: 28)
According to this verse, God is giving permission to the believers to be precautious and to pretend to be friends with the unbelievers to escape from the risk if there is a possibility for them to get killed… People should act reasonable all the time and to save their lives and properties and not to risk them.
Imam Sadiq was not the first one who used this principle; Imam Ali too had lived based on this principle most of his life. He even proposed to the Shias to have this possibility in mind and to act precautious towards the oppressor governments. He would always tell his companions to hide their beliefs in both what they say and in what they do.
At the time of Imam Hussein, only on the third decade AH there was a relative freedom. Even at that time the Shia was under close observation. But it has never been harder on the Shia than at the time of Umayyad Caliphate and Mansour Abbasi later. Imam Sadiq and his companions had to be very cautious in order to save their lives.
He even told Mualla bin Khunais, “Mualla! Keep our secrets and do not tell anyone about them. God rewards the one who keeps our secrets.”
The pressure was so much that the Shias even had to pass by each other indifferently. Abu-Jafar Mansour too seemed to have spies everywhere, “Mansour had spies in Medina that would kill anyone who would go to the Shias of Jafar.”
B. Changes of Behavior of the Oppressors towards Imam Sadiq
Some of the rulers, particularly, Mansour, were not psychologically firm. Mansour was the ruler of the Islamic countries, but because he knew Imam Jafar Sadiq was the true leader, who had every virtue, and because he knew that he could not resist Imam Sadiq if he would start a fight against him for getting the government, he sometimes ignored Imam Sadiq’s harshness; he did not want to provoke him, so that he would start a battle.
At the same time, Mansour loved his position as the ruler, and this excessive love had made him unable to see and to hear the truth. So, he would sometimes offend Imam Sadiq and even tried to kill him.
Therefore, according to the situation, Imam Sadiq would talk about what he really believed in, or would act precautious.
source:english.tebyan