Is the moth the soul of the dead?

It was cold when grandpa died, and there were almost no bugs in the mourning hall. The night before cremation, I cried badly beside his body. At that time, I was the only one in the mourning hall. When I was crying, I suddenly found a moth flying in front of my eyes. It has never been there before. I thought about it at that time. I cried for a while, suddenly remembering that moths are souls, and then I looked up. I feel very uncomfortable without a moth to put out the fire. I really hope that's my grandfather.