We all know that there is an end to everything, although we can't realize it until it actually happens.
These candles lived their lives together, knowing each other since childhood.
For them, it was extremely painful to see their best friend slowly burning out.
Besides the pain of losing someone dear, they also realized that they are slowly heading towards the same direction.
The flame of life will melt them down, one drop at a time, until the fire will extinguish forever.