It is possible for a single individual to defy the whole might of an unjust empire to save his honor, his religion, his soul and lay the foundation for the empire's fall or its regeneration.
It is also a warning. It is a warning that, if nobody reads the writing on the wall, man will be reduced to the state of the beast, whom he is shaming by his manners.
Active nonviolence of the brave puts to flight thieves, dacoits, murderers, and prepares an army of volunteers ready to sacrifice themselves in quelling riots, in extinguishing fires and feuds, and so on.