Therefore...
Therefore, the issue of establishing justice was the main and general aim of all the prophets. In other words, according to the exact sayings of the Holy Qur’an, the prophets came and had a mission and a message which was Justice.
The second matter which I must mention here is this: the issue of justice (that is the universal justice and common justice not the relative or individual justice)by justice we mean that there will come a day in this world for mankind when all traces of tyranny, oppression, discrimination, war, hatred, bloodshed or exploitation and their tools such as lies, hypocrisy and deception will ultimately be nonexistent. Will man ever see this day? Is this only a wish that will never come true?
Is it even possible for some who does not have a spiritual disposition to say: I do not deny the universal justice, I am not a supporter of widespread oppression as the basis for our world but I believe that our world is so ominous, shallow and gloomy that there will never be a place for universal or true justice, peace, purity or true humanity? There will never be a day that human beings will actually live together in peace.
The world is the place of darkness and oppression, all the oppression will be compensated in the next world. Justice only belongs to the next world. This idea exists among non-Muslims and people of other religions. One of the main advantages of Islamic belief (and especially in the eyes of the Shi‘ahs in relation to Islam) is: do not be pessimistic. The age of war and fighting, the age of moral corruption and the age of darkness are temporary. The final outcome is luminosity and justice.
Even if this teaching is present in other doctrines, it is not as certain and clear as it is in the Shi‘ah doctrine. Another matter regarding the future of man in this world is goodness, death of oppression and the advent of justice. If man were to contemplate the Qur’an, he would see that the Qur’an emphasizes and confirms this matter and also gives glad tidings about the future of the world.