Let's try this.
We are all made up of 3 parts: Body, soul and spirit.
Our body relates to the physical world around us. We can touch, see, hear, taste, smell.
Our soul relates to other people. It is our mind, will, personality, etc.
Our spirits relate to God. We commune with God spiritually.
When Adam & Eve sinned, their spirits died just as God had mentioned. As such, they were cut-off from God. Their children were also born spiritually dead, therefore, unable to communicate with God.
As such, God had to come up with a "Plan B". This involved His Son being crucified. All have access to this free gift.