Taking a look at the verse showing the cause of death in this world:
Rom. 6:23 "For the wages of sin is death..."
It is because of sin we must die. But we MUST understand where our sin was first committed. Let's take an example from a baby:
Rom. 6:23 "For the wages of sin is death..."
It is because of sin we must die. But we MUST understand where our sin was first committed. Let's take an example from a baby:

Looking at this, we can imagine this earth as a jail. As the criminal commits the crime outside of the jail and is sent to jail, so we committed the sin against Elohim God, Father and Mother, in heaven and have been cast to this earth, (Eze. 28:11-18, Isa. 14:12-15). 

Just think, what degree of sin is deserving of death? Stealing a bike? Stealing a car? Robbing a bank? have you ever heard of the la of God and principal of this world: "an eye for an eye, a tooth for a tooth, a life for a life..."
Yeah, but we pay for our sin by giving our own life. Did it click yet?