Set was incredibly jealous. Set killed his brother Osiris, and chopped him into little pieces. He threw the pieces into the Nile River. Set was sure he would get away this murder. Isis soon heard what Set had done.
Isis managed to gather the pieces of her beloved Osiris. She brought these pieces to her good friend Anubis, the jackal-headed god. Anubis was very clever. He managed to put the pieces of Osiris together again. But he did not have the power to bring him back to life, so that Osiris could retake his place beside his beloved Isis, and rule Egypt as king.
When Horus heard what his uncle Set had done, although he was still only a boy, he tracked down his uncle Set and murdered him. Isis was very grateful to Anabis but she was still very upset because no matter what, Osiris was dead. She knew she was never going to see her husband ever again.
In honor of the god Osiris, the pharohs of Egypt carry a crook and a flail, the signs of Osiris. The crook especially became the sign of rulers. The crook looked a great deal like a snake and was made out of wood. They used wood because wood was scarce. That made it even more special.
From then on, and even today, once each year Isis travels to the riverbank. Remembering, and dreaming, tears fall from her eyes. That is why the Nile River rises each year, to bring life to everyone and everything along the Nile. When Isis cries, the Nile will rise! And that is a very important thing.