The scarab beetle — Scarabaeus sacer — was observed by ancient Egyptians rolling balls of dung across the desert sand, pushing them with its hind legs as it walked forward. From these balls the beetle laid its eggs; from the buried ball the larvae emerged, apparently from nothing — the young beetles appearing to spring spontaneously from the dung without visible parents. This observation produced one of the most sophisticated symbolic equations in human history: the scarab rolling its ball of dung is the sun god rolling the solar disc across the sky. And the larvae emerging from the buried ball are the reborn sun rising from below the horizon each morning.
The hieroglyphic sign for the scarab — ḫpr — is also the root of the verb "to become," "to come into being," "to transform." The scarab is not merely a creature associated with the sun; it is the embodiment of the principle of becoming — of transformation from one state to another, of emergence from apparent nothingness, of the self-creating force that underlies all existence. The god Khepri is not a deity who was created; he is the deity who creates himself, spontaneously, each dawn. He is existence choosing to exist.
The scarab amulet — produced in enormous quantities throughout Egyptian history — was placed in tombs to ensure the same transformation for the deceased that the beetle enacted each morning: the passage through darkness into renewed light. The heart scarab — a large scarab placed on the chest of the mummy — was inscribed with Chapter 30B of the Book of the Dead, a spell instructing the heart not to testify against its owner in the Hall of Judgement. The scarab was the guarantor that the heart would not betray the soul at the moment of its most vulnerable transition.