“For all have sinned and fall short of the glory of God” (Romans 3:23). Sin is breaking God’s law, and there’s a penalty for sin. Romans 6:23 tells us the punishment for breaking God’s law: “For the wages of sin is death…” Wages are what we earn for what we’ve done. According to the Bible, we have all earned death.
When the Bible speaks of death, it speaks primarily of separation. When we die physically, our spirit is separated from our body. In similar fashion, when we died spiritually because of sin, our spirit was separated from God’s Spirit. “But your iniquities [or sin] have made a separation between you and your God,” (Isaiah 59:2).