For the wages of sin is death…..

Physical death is the separation of you and I from our physical body.  We are spirit beings confined to a physical body until the body dies.  When physical death comes, we are released into eternity to live somewhere forever.

Spiritual death is the separation of unbelievers from God.  The second death is the separation of unbelievers from God forever.

Because of sin, we are born into this world spiritually dead or separated from God.  That is why Christ told Nicodemus that he must be born again in order to see the kingdom of God.  

The second birth is a spiritual birth that unites us with God as one of His children.  All those who have been born of the Spirit have been born again.

He that is born once, dies twice. He that is born twice, dies once.

For the wages of sin is death, but the gift of God is eternal life through Jesus Christ our Lord.  Romans 6:23

But as many as received Him (Jesus Christ), to them gave He power to become the sons of God, even  to them who believe on his name.  John 1:12