The cult of Isis remains a mystery even nowadays.This powerful goddess is the most representative deity of the Egyptian religion. Her omnipotence is due to her ability to find out both the real name and the source of Ra's power. Although not entirely adopted by the Romans under Augustus, but appreciated by Caligula, the cult of Isis finallty fascinated them. Hence, it acquires syncretic features in the novel of Apuleius,? The Metamorphoses?. The Apulean hero is similar to Isis in his patient search for a different way of understanding and becomes at the end of the story a priest of this goddess and of her husband Osiris.