God gave a warning in the garden- the day you eat of that furit you shall die- Adam and Eve didn't die a physical death (body), their minds did not cease working (soul) but they expierienced spiritual death which meant seperation from God. This spirit was the breath of God and was the very life force imparted to man. In the Herew or Greek the have basically the same defintion.
In Gen 2:7you will find that it is when God breathed this breathe into Adam that his body came to life and his soul came into being.
Man was seperated from God and there was only one solution- as prophesied by Ezekial:
Eze 36:26 A new2319 heart3820 also will I give5414 you, and a new2319 spirit7307 will I put5414 within7130 you: and I will take away5493(853) the stony68 heart3820 out of your flesh,4480, 1320 and I will give5414 you a heart3820 of flesh.1320
Eze 36:27 And I will put5414 my spirit7307 within7130 you, and cause6213 you to walk1980 in854 my statutes,2706 and ye shall keep8104 my judgments,4941 and do6213them.
Eze 36:28 And ye shall dwell3427 in the land776 that834 I gave5414 to your fathers;1 and ye shall be1961 my people,5971 and I595 will be1961 your God.430
This life of God must be imparted to man in order for him to be restored to the fellowship he was created for and and clearly stated by Jesus:
John 3:3 Jesus2424 answered611 and2532 said2036 unto him,846Verily,281verily,281Isay3004untothee,4671Except3362a man5100beborn1080again,509hecannot1410, 3756see1492the3588kingdom932ofGod.2316
In order to see, perceivie, understand or have any part in the Kingdom of God we must receive this new spirit from God- His life is imparted and the doorway to walking,talking and understanding Him is now opened.
First God gives us a new spirit , He gives us a new body at the ressurection, He saves our soul thru the renewing of our minds according to His Word.