The Latin phrase sub rosa means "under the rose", and is used in English to denote secrecy or confidentiality, similar to the Chatham House Rule. The rose as a symbol of secrecy has an ancient history. The rose has held a deeply symbolic significance in many times and cultures as a symbol of maternal creativity and of the yoni or feminine generative power. The literal rose and its essence or attar has also played a role in religious and spiritual rites which ofttimes would have been held in secret. The rose has sometimes been said to have been the emblem of the god Horus in ancient Egypt. However, the gods in Egypt were usually associated with the lotus. The idea of Horus being linked to the rose probably arises from Greek and Roman cultural cross-transmission of myths from Egypt. Firstly, the roses connotation of secrecy dates back also to Greek mythology. Aphrodite gave a rose to her son Eros, the god of love; he, in turn, gave it to Harpocrates, the god of silence and a Greek name for a form of Horus, to ensure that his mothers indiscretions (or those of the gods in general, in other accounts) were not disclosed. Secondly, in Egypt, the rose was actually sacred to Isis but this appears to have been during the Roman period of Egyptian history—"Probably due to assimilation with the goddess Aphrodite (Venus), during the Roman period, the rose was used in her worship."