Since the dawn of time, the First Light manifested limitations that were inherited by his offspring.
In exchange for power that stood tall compared to others, he inherited a decree.
An Angel can never use their powers to harm others who have no impurities in their hearts. An Angel's main duties are to preserve life and protect the innocent. Anyone who was born an Angel would inherit these limitations.
Noble. Grand. Pure duties that befit the strongest.
Power can be good; that is what the First Light's message was.
Demons existed and were known by many before Angels, and their erratic, even outright heinous, desire for power twisted the view of many. Power is often associated with bad things. Thus, the message the First Light brought was powerful.
So much so that Angels are associated with good things by many.
If someone were told to imagine the embodiment of good, most would imagine an Angel.
And throughout eras, Angels remained consistent.
But nothing can be all good.
