Slaying of Tripurasura - Though it is denoted that lord Shiv demolished the 3 cities that came in align in one line after thousands of years and that day is celebrated as Dev Diwali - the spiritual meaning is different.
Tripura denotes ‘3’. It means 3 bodies- physical, astral and causal. It means 3 tendencies - tamasic , rajasic and sattvic. When the 3 bodies are aligned together and when the 3 tendencies becomes null ( i. e. no particular tendency remains) than the lord can ignite the arrow (arrow- here is the meru parvat) that means the kundalini can rise to its final destination and reach above the 3 bodies towards enlightment. Enlightment here is celebrated as ‘ dev diwali ‘ - festival of lights. True knowledge is lighted up. On this day of Kartik poornima, the energy flows in the universe are aligned in such a way that to rise above 3 bodies & 3 tendencies becomes easy and to reach enligtment becomes easier. This is the day jains also celebrate Dev Diwali meaning that million of souls achieved enlightment on this day.
- These are topics of various aspects of spirituality as told by Para.