[bearbear]

Romans 6:21-22 also juxtaposes death and eternal life directly:
"But what fruit were you getting at that time from the things of which you are now ashamed? For the end of those things is death. But now that you have been set free from sin and have become slaves of God, the fruit you get leads to sanctification and its end, eternal life. For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord."

If "death" is the opposite of "eternal life", is it too far of a stretch to link this to the "death" or "second death" in Revelation 20:14:

"Then death and Hades were thrown into the lake of fire. The lake of fire is the second death."

John 8:24
"I told you that you would die in your sins, for unless you believe that I am he you will die in your sins.”"