Oh boy, some of this gibberish is in my area of expertise!
Some people think that reincarnation is real and so many people think that ghosts are impossible: although it should be noted that ancient Egyptians thought that when someone died the soul split into many parts and so people were reincarnated, became ghosts and moved onto an afterlife all at the same time.
The kernel of truth here is that ancient Egyptians did
believe that each person was made up of several different spiritual elements. Like the ka
, which was what you might call the 'life force' of a person, or the ba
, their identity and personality, along with a bunch of other obscure bits. They didn't have a concept of a singular 'soul' that split upon dying. (They even thought that the physical body itself was spiritually important, hence the whole mummy thing.)
Egyptians didn't exactly believe in reincarnation, either. What they did believe is that certain spiritual entities shared a ka
. For example, there was a "royal ka
" shared by every king. The new pharaoh wasn't the old pharaoh brought back to life, they just had the same life-force that every pharaoh had.
Egyptians also didn't exactly believe in ghosts. What they did believe is that once someone was dead and comfortably in the afterlife, they because an akh
or "effective spirit"—effective in the literal sense of being able to do things. So you might write a letter to your dead relatives (or more likely, get a scribe to write you a letter) asking them for good harvests, or to stop cursing your cows, or whatever. These were generally written on pottery and then smashed, which would send the message to the afterlife.
Depending on your relatives, you may find asking them for help less helpful than going out back and smashing pots for a bit.