One of the main teachings of the prophets was virtues linked to God. Those characteristics that are good in themselves that lead to goodness are natural and linked to God you could say Angelic attributes for the people.
Natural in that they agree with the "Fitrah" (natural disposition) of Man.
Angelic in that they are the opposite of what is Evil.
The virtuous in society tend to be the upper classes, those with manners and goodness and it can be seen that they are separated from the lower classes in society. Character, virtues, goodness act as a gradient in society to the upper and lowest ends. In essence these attributes are deeply rooted in man. Highest of these attributes to believe and Worship God is what makes all these virtues True and are its pinnacle. Devoid of these attributes you get the "criminal class" in society, those feared by the people that destroy societies, that prey on the weak in one shape or form. You can see their "Law" in action within prison populations (their codes of conduct and punishment)
The Law the prophets brought embodied these virtues and provided constraints and bounds. These constraints and bounds also exist in the spiritual realm meaning that evil can be avoided without someone knowing it is actually evil. For example Ritual Purification, sex outside of marriage (devoid linking it to God), gambling, intoxication, Tarot cards, Wee Gee boards, sacrificing to Other than God Alone and idolatry
The Law the prophets brought and Taught would be recognized by ones nature (Fitrah) and linked to God. These boundaries provided guidance for ones soul and avoiding evil (sometimes the evil is apparent i.e. killing unjustly or sometimes not apparent as in the aforementioned)
Their teachings, warnings, purification themselves was the proof of their prophet-hood, As a truth seeking soul would tend towards what is good. Ultimately to accept the prophets. No collecting of converts required here, since we know the prophets were often killed and persecuted always in the minority. The masses pleased with living the animal life of getting paid, eating drinking, fulfilling their sexual desires and living in comfort. A type of indifference to life and death.
A soul that is arrogant, maybe evil would tend towards a philosophy that justifies their need desires. Maybe a philosophy that enables them to live in the status quo and tells them that they are good. One such example if the philosophies of the Hindu Gurus which allow the western man to fulfill this criterion and give their paganism justification. To live in Self worship as Gods.