The greatness of many great people in history is destined in their different childhoods and Mohsen is not an exception. Having a clergy man as his father and a religious home brought him acquaintance with the teaching of Profit Mohamed's household and reliance on his ancestor, Imam Mosab-ne-Jafar, in coming years of his life.

Beginning of school days was the beginning of a new season in his life and his 11 marked the commencement of his political and social activities. Having been familiarized with Quran since childhood, he blessed his talents by memorizing Quran versus and benefiting from it in managing his life due to which he enjoyed a successful education in which he was able to graduate from college at th age of five and to immediately pursue his tertiary education in electronics at university.

His life full of endeavor and triumphs was enlivened by his meeting his lifelong soul mate at the age 54. However, his political activities, being investigated by Intelligence service and the pressure of the family made him leave the country in his 56. Nevertheless, he follows his own beliefs by participating in forums and demonstrations against the then American administration and proclaiming Islam in the U.S until he met Imam Khomeini in Paris to be briefed on his duties. After the victory of Islamic revolution in 58 he had his chance to get to his homeland in 1979 once again. In the same year, after receiving an invitation from Shied organization of Lebanon and Dr. Chamran, Imam urged him to go to Lebanon in an educational group. War-stricken Lebanon demanded another kind of manliness which could be seen in his important role forming the early core of Hezbollah. Alongside his struggle and fighting and speeches, he supported oppressed Lebanese.

In 1359, during all those stressful days of love and sacrifice, his life was one more time enlivened by his first child. He expresses his feeling in a letter to his wife as follows:

          "I hope and I am certain that this fruit of our life will be a good legacy of you and me and our life. And, unlike many who feel more connected to this world and find it more difficult to have to leave this world one day after they have their first child, I feel more relieved and the taste of leaving of this world is sweeter than before and I am sure this is God's blessing as I have always asked God to pave my way to him. And, I see not only he has not blocked my way but he has provided me with a strong motive to move faster on my way. Although my child is forced to lead his life without his father, isn't it that huge number of great people has lived their lives as orphans…."

After being appointed to charge d'affairs, he miraculously survived an assassination attempt by the Government of Iraq. He was meant to be given another chance to pass the great of test of God.

On 6^th of June in 1982, Israel attacked Lebanon in a massive air, land and sea strike in which Israeli forces invaded the land of Lebanon. In less than few days, Israeli forces occupied a huge area of south of Lebanon. Israel's taking control of couth of Lebanon, retreat of Arafat's forces to Beirut, and overt cooperation of Kataaeb party and Bashir Jamil, commander of Lebanon military forces with invaders lead to the siege of Muslim parts of Beirut.

During war time, Mohsen Mousavi was spending his leave of absence in Tehran. Upon receiving the news on the invasion, after canceling his leave of absence, he immediately headed to Syria to get to his office in Beirut as soon as possible. During the war climate when ambassadors of other countries left the country with their families, Mohsen as an evident manifestation of the unity of politics and religion decided to remain in Lebanon and serve his duties along with his team. At 16:30 in the afternoon of 4^th of July in 1982, Seyed Mohsen Mousavi, Ahmad Motevaselian, Taghi Rastegar and Kazem Akhavan set off to Beirut and as Beirut was under the siege of Israeli forces, they headed toward Zaghrata through Bal-ak. From that point on, they were taken on their course in a Lebanese military car until their arrived in Barbra which was the concentration point for Flange forces and before Barbara check point, they were kidnapped by Flange forces under the command of "Ili Habigh" and "Saeer Ja-Ja". Later, they were handed to Israeli forces.