The Prophet's Mercy
Just as the Prophet of Islam was merciful and sympathetic toward the believers, he was the same in the case of the non-believers as well. He was greatly concerned about the non-believers. That is, it used to distress him that they would remain in their state of infidelity and end up in the fire of hell. He was sympathetic toward them. His invitation was for the sake of delivering these infidels; those recalcitrant people. Addressing him, God, the Blessed and Exalted, says: "It seems as if you want to kill yourself for the sake of these people who have not become believers!" He was very distressed as to why they did not profess the faith and why they did not want to be delivered; why? According to history, when, in a war, a group of chained unbelievers was brought to him, he stated that they should be sent, bound in chains, to heaven! They had to bring them like this and guide them. He was the guiding light. (Sahifeh, Vol. 8, Page: 334, Speech, July 3, 1979)
If prophets were unhappy, it was because he asked why God's devotees should consider them to be independent, work for them and be engaged in corruption. They sympathized for this. I consider it likely that the utterance of the Prophet: "No Prophet experienced the afflictions I did." to carry this meaning. I deem it likely that the knowledge enjoyed by the Prophet of Islam was not enjoyed by others whatever stations they commanded were not comparable to those of the Prophet of Islam. The greater the stations, the more one will feel annoyed with the sins committed in the world. If he hears that one in a corner of the world has suffered trouble, he will be uneasy, not because this has happened in his city or country committed against his relatives, but because one has been oppressed in the world. (Sahifeh, vol. 19, Pages: 184-185, Speech, March 21, 1985)