Mary......
What I am inspired to understand that I feel is the answer to your question is that most all references to life, death and resurrection is speaking in a spiritual and not physical sense.
Together with the scripture you are questioning is the scripture stating "he that has faith in Christ will never die at all. "
The key to understanding all this scripture and others is knowing that what is being spoken of is spiritual death. That means being disconnected from the source of life the Creator. It is like not having access to the recharging of a battery. The machine can run on the battery for a length of time before it ceases to operate altogether. But the moment God disconnected from man man although physically still alive was considered instantly (in the day) dead spiritually.
Also there is "do not be afraid of he that can just destroy the body but not body and soul in Gehenna. Destroying the body is physical death. Body and soul in Gehenna is speaking of spiritual death. Realize Christ himself was in Gehenna for three days. His spirital death preceded his physical death. He had been abandoned or cut off from God before he was able to be killed.
Thus Jesus cried out at his death "Father, father, why have you foresaken me." This indicating his spiritually dead condition. His resurrection was thusly spiritual as he was resurrected in the sense of having his relationship restored with God.
Also is explained the first and second resurrection in Revelation. The first resurrection to a restored relationship with God could only occur after Christ ransom sacrafice and the foregiveness of sin. Until that time all men of righteousness (those that love God and neighbor) had to sleep in spiritual death until they were reconnected to God at this point.
The first ones of those thereafter to die as faithful followers of Christ will receive the first resurrection to serve for 1000 years with Christ within the first Millenium following Christ resurrection to spirit life. After the 1000 years there will be a resurrection for the rest of the dead both righteous and unrighteous.
After the release of Satan from spiritual bondage there has been a time of testing for mankind at the end of which there will be a final judgement in the last days of all of mankind and a deternination of who would be deemed wicked and suffer the second death. After this death and Hades will be cast into the lake of fire meaning only tat man would never die again spiritually .
Zechariah