The Festival of Samhain, marking the end of the year and the beginning of the new one in the Celtic calendar. Traditionally, bonfires were lit to remind us that the encroaching darkness will not prevail

Thinking gives off smoke to prove the existence of fire
There are wonderful shapes in rising smoke that imagination loves to watch
But it’s a mistake to leave the fire for that filmy sight
Stay here at the flame’s core

Rumi