Vision on death:

They believed view reported by Philostratus of Tyana in the second century that the Celts believed that to be born in this world, we have to die in the Otherworld, and conversely, that when we die here, we are born into the Otherworld. For this reason, Druid funerals try to focus on the idea that the soul is experiencing a time of birth, even though we are experiencing that as their death to us.