The day is the day when Goddess Durga kills demons and their King
Mahishasur. It is a day when all the people of Universe worship Goddess
Shakti. Shakti thus symbolizes power, ability and bravery. Today is the
bisharjan of idol in to holy water (river) to end the celebration of Durga
Puja and all devotees sits tight with tears and feel happy that Mother Durga
will come back again.
This day also celebrates the victory of Lord Rama over the demon king
Ravana.
This is the day when Lord Ram defeated Rakshash King of Lanka with the
blessing of Devi Durga. This is the day where Evil been destroyed by Value
and good positive force in form of Lord Rama.
Ravana was very brilliant and possessed all universe knowledge, but due to
turning in to egoistic and wanting lust, he had turn in to evil person. Lord
Rama protected Universe and killed Ravana. And in this particular day Good
wins over evil. And from that day Ravaana idol is burnt to celebrate the win
over evil.