Why do you think the egyptians believed in gods and goddesses

They believed in gods and goddesses so they could count on someone to help life go smoothly.

Because many of the Egyptians believed in Reincarnation. This basically means that they believed that you were resurrected into a different but equal life form once you died. For example, If you were a calm giant when you were human, you would most likely become an ample cedar tree in the afterlife. But if you were a bold, strong, "godly-like" person when you were human, you would most likely become something "godly", such as (nonetheless) a God.