Durga in Sanskrit means “Invincible‚ The r in durga denotes diseases (rogaghna) and the ga is the destroyer of sins (papaghna), injustice, irreligion, cruelty, laziness and other evil habits.Thus the goddess Durga destroys all these evils represented by du, r, and ga. The worship of Durga has been popular since very ancient times. Lord Ram worshipped Mother Durga to attain victory over the demon King Ravana. The Mahabharata mentions the worship of Durga by Krishna for obtaining victory over the kauravas. Durga symbolises the nondualisitc existence of energised consciousness or conscious energy. Being the divine mother, she destroys the disharmony that is creating imbalance in the phenomenal world.
The eight petaled lotus of the yantra represents the octave of existence: (1) Love (2) mercy, (3) sacrifice (4) penance (5) selfless (6) devotion (7) faith and (8) detachment of all achievements. These help the divine in us to evolve and to get away from dukh (sufferings), daridra (poverty), and durvyasana (bad habits, addictions), rogaghna (diseases) and papaghna (injustice, irreligion, cruelty and Laziness).