There are a few exceptions to humanities two life cycles. Those who were resurrected back to a physical life by Jesus, but go on to die later, will have three life cycles. The same holds true for the ones Peter, Paul, Elijah and Elisha brought back from the dead and of course the many saints who came back to life at the crucifixion of Jesus. All These will experience three life cycles. The last exception will be those believers who are alive at the second coming of Jesus. It is explained they will not die, but will be changed into immortal spirit in the blink of an eye. For most of humanity though, the two life cycles rule will apply to them.
Other scriptures describe most humans as living two life cycles. This proof comes by way of how many times people die. If a person lives a first time and then experiences their first death, that would complete their first life cycle. The Bible tells us about people having a second death. Having a second death, demands they have a preceding second life. Any death they experience after that would have to be preceded by a life, as death is the end of a life. Before you can take life away through death, there first needs to be a life to lose. The second death has no power over those who are resurrected at the return of Christ because they are raised to immortality. Being raised immortal means they can never die again, they possess the eternal life Jesus promised.

Revelation 20:5-7 Names of God Bible
5 The rest of the dead did not live until the 1,000 years ended.
This is the first time that people come back to life. 6 Blessed and holy are those who are included the first time that people come back to life. The second death has no power over them. They will continue to be priests of God and Christ. They will rule with him for 1,000 years.
Revelation 2:11 International Standard Version
11 ‘Let everyone listen to what the Spirit says to the churches. The one who overcomes will never be hurt by the second death.’”

Those resurrected back as mortal people into the world ruled by Jesus will die again if they don’t follow the path of righteousness. The only way to avoid the second death is to believe in Jesus during that second life. What do you know about a second life? How does having a second life change your feelings towards those not following God now?

Revelation 21:8 International Standard Version
8 But people who are cowardly, unfaithful, detestable, murderers, sexually immoral, sorcerers, idolaters, and all liars will find themselves in the lake that burns with fire and sulfur. This is the second death.”