Our Body is not us. We are Spirit, our body is merely clothing for us, each of us being spirit. Scientists have tried to locate where in our brain memories are stored by brain activity while the person is recalling memories. Thus they once thought that they understood where in the brain memories are stored, Brain damage to that area should have destroyed those memories, but the same memories return in another area of the brain.
We are not our body. Through our thoughts we tell our body to do certain things like turn to the left or right, pick up a sandwich, read, etc. but 99% of the functions of our body operate without our awareness or our control.
If we get behind the drivers seat of a car, through our thoughts we control our car, make it go straight, left, right, or back up; to go or stop, the speed, etc. The car, like our body, performs many functions that we are oblivious to. And no one would say the car is us. Similarly our body is not us.
People have had out of body experiences, where they can see their own bodies and what is going on around it, and even go somewhere else before returning to their body. One of my brothers experienced leaving his body after his school bus got into an accident, he looked down to see the arrival of the ambulance and being put in a stretcher, and he saw all the commotion going on around that scene, before he returned to his body.
My spirit, when a child, left my body while I was sleeping, and rising way above my home, as everything became smaller and smaller, including Earth, then I was suddenly in the most beautiful place of trees hills waters. and I had another out of body experience many years later, which i will not share.
But this one I will.
As a child perhaps 9 or 10, I use to feed nuts to squirrels and they became very friendly toward me. This one squirrel would come to my 3rd floor window and I occasionally gave him a walnut, and watch cut it open it by sawing it with his teeth. Then I used a nutcracker a few times and left the cracked open walnut on the window sill. after a few times of this, I decided to go back to just giving him the walnut. He took it away, then to my surprise he returned to my window with the walnut. He looked at me while holding the walnut. As I didn't move, he came into my room, which startled me a bit. He placed the nut on the desk, and stared at me. I figured out that he wanted me to use the nutcracker to open it, and I did and he hurriedly ate the nut and left. Around this time, I wondered what it would be like to be a squirrel with such a small brain. and this may have been a dream, but I was in a squirrel's body, seeing through squirrel's eyes, looking at my house from the tree branches, and then running through the tree and jumping branches, and observing the world around me from a squirrels perspective.
Here is a few Jewish thoughts on life after death:
The Christian view is that all can receive eternal life as a gift from God through Jesus by accepting His blood atonement on the cross as washing away all one's sins for all time, and thereby enter into a fellowship with God via the indwelling Holy Spirit, by whom we are transformed to naturally do the good He created us to do.
4 Nicodemus said to Him, "How can a man be born when he is old? He cannot enter a second time into his mother's womb and be born, can he?" Jesus answered, "Truly, truly, I say to you, unless one is born of water and the Spirit he cannot enter into the kingdom of God. That which is born of the flesh is flesh, and that which is born of the Spirit is spirit. Do not be amazed that I said to you, 'You must be born again.' The wind blows where it wishes and you hear the sound of it, but do not know where it comes from and where it is going; so is everyone who is born of the Spirit."
9 Nicodemus said to Him, "How can these things be?"
Jesus answered and said to him, "Are you the teacher of Israel and do not understand these things? Truly, truly, I say to you, we speak of what we know and testify of what we have seen, and you do not accept our testimony. If I told you earthly things and you do not believe, how will you believe if I tell you heavenly things? No one has ascended into heaven, but He who descended from heaven: the Son of Man. As Moses lifted up the serpent in the wilderness, even so must the Son of Man be lifted up; so that whoever believes will in Him have eternal life."
16 "For God so loved the world, that He gave His only begotten Son, that whoever believes in Him shall not perish, but have eternal life. For God did not send the Son into the world to judge the world, but that the world might be saved through Him. He who believes in Him is not judged; he who does not believe has been judged already, because he has not believed in the name of the only begotten Son of God.
This is how easy God made it for anyone to have eternal life. You need not be perfect, you need not been sinless to receive eternal life. The fact is we will all sin throughout our life on earth. Eternal life is truly a gift from God.
As to Moses holding up the serpent staff: The people were inflicted with poison that would soon make them die. If they looked upon the serpent staff that Moses held up, they were instantly cured and lived. Those who did not believe such nonsense and did not look, died.