The messenger of Allah used propagate by means of two truths. One was the Holy Quran by which he communicated with people and the second one was the extensive science he was granted by Allah Almighty. He could recognize all virtues and vices through this science and knew all moral, psychological, and intellectual gaps of people. these two truths, also known as Quran and science, was interpreted as wisdom by the lord of the universe. in other words, it was a knowledge he conveyed to other people and those people who accepted it were good and reasonable people; they could see that whatever the holy prophet is offering is nothing but truth, and there is no doubt in truth, and it cannot be denied because it is crystal clear. It is like the rules and formulas of math; it cannot be changed. It is fixed and stable rule for either the believers or the unbelievers.
source : erfan.ir
