The ancient Greeks believed the circle to be one of the most perfect of all holy geometric shapes, for life runs in cycles, waves and circles. People naturally gather in circles and expand outward from that center, much as trees in the forest or other biological cells and structures. And those who follow in the next generation repeat much the same cycle.
Thus we see spirits circling the earth to be born onto a family circle, maturing and making new associations, attachments and circles of friendship, possibly getting married to create a new family circle and eventually laying down the body to move on to bigger and better things, joining their circle of spirit helpers and guides.. These circles are all part of the cycle of life. There is no death.