Tuck everlasting

Tuck says that life is all around them. The water looks the same, but in fact it is always moving, drifting to the river and eventually out to the sea. When it reaches the sea, the sun will cause some of it to evaporate and then come down again as rain, which will fall in the pond and start the whole cycle again. Everything is a wheel, he says. Tuck adds that Winnie is a child now, but she'll one day become a woman and then eventually die so that she can make room for more children. This scares Winnie, but Tuck insists that dying is just part as much part of the wheel as being born. You can't have one without the other.