Why is Fire Sign of "Dharma" or "Duty"
Out of the four elements of Zodiac Signs (Fire, Air, Earth and Water), Fire is the most difficult to pollute.
We have always heard about air pollution, water pollution, earth pollution but not about Fire pollution.
Fire is inherently known to burn impurities and show the path of righteousness to native and it is the sign of "Dharma".
So if the Fire sign or fire sign elements are well placed in the chart, the person will cheat in the name of "Dharma" or "Religion" or "Spirituality".