Many, but not all, of the deities worshiped in the mysteries were originally associated with fertility. As such, their associated myths often referred to the natural cycle as it waxes and wanes (for instance, Demeter) or to the dying and rising of a god (Attis, Adonis, Osirs). Some scholars thing that the mysteries used this feature of the myth to give symbolic expression of rising to immorality with the deity. However, not all scholars agree; some deities venerated in mystery religions did not die or rise; moreover, the exact use of the myth in the mysteries is often unclear, though some concept of immorality seems to be implied.