The men who led the church after the apostles died. They are called the Early Church Fathers. Some of them overlapped the apostles and, of course, learned their theology from them and from their writings, which were later collected into one volume under the title “The New Testament”.
The writings of the Early Church Fathers do not speak in terms of innate immortality or eternal torment but held closely to the biblical language indicating their acceptance of what came to be known as “Conditional Immortality”. This is not surprising as that is what the Bible teaches.
Where is hell?
Hebrews 12:1-3 ESV
Another name for it transmigration. In today’s Western world this doctrine has become popular. It is part of the New Age beliefs; it is popularised by such people as the actress Shirley McCaine, and by others who declare they can remember something of their previous life or lives. Most of us have met people with this belief.
On the first Sunday of April 1965, at the tender age of 9 months, mother decided the time had come to trundle two older brothers, a reluctant husband, and me off to Saint Matthew’s Anglican Church in Hastings. I don’t recall this, but the vicar K.F. Button sprinkled me with holy water and pronounced me right with God (according to our family tradition). I have the ‘Certificate of Baptism’ to prove it. According to my certificate my parents vowed that I would ‘Be virtuously brought up to lead a Godly and a Christian life.’ This meant nothing to Father who had no time for religion, except to keep Mum off his back. For Mum the vow consisted of making my brother and I kneel by our bedside and repeat ‘the Lord’s Prayer’ in good ol’ King James English. It wasn’t long before my brother and I convinced Mum she was fighting a losing battle introducing religion into our lives. It was Dad and us against her. 
An English vicar, Rev. Edward Tomlinson, of the Church of England, got grief for himself when he suggested that his role at funerals that featured pop music and bad prose from grieving participants was superfluous:
“I have stood at the Crem like a lemon, wondering why on earth I am present at the funeral of somebody led in by the blaring tunes of Tina Turner summed up in pithy platitudes of sentimental and secular poets and sent into the furnace with “I did it my way” blaring out across the speakers,” he wrote in his blog on the website for St. Barnabas Church in county of Kent.
Dr. John Roller sends out regular emails answering questions on matters related to the Bible from a Conditional Immortality perspective. More information about Dr. John Roller, including more free Conditional Immortality resources can be found on 
Justin speaks in various ways of the evildoers’ “punishment in eternal fire” and of “eternal punishment”. He says that “the sword of God is fire, of which they who choose to do wickedly become the fuel.” These are not just “big words and bugbears”, says Justin, as if Christians wished only to scare people into living a virtuous life, rather this punishment reflects the reality of God’s justice. While the language of “eternal punishment” and “eternal fire”, as it is found in Scripture, is adequately explained by Conditionalist writers, either as referring to the result of the judgment, or to its sharing in the quality of the “age to come”, there are, however, some more explicit statements of Justin’s which seem to conflict, and therefore need to be reconciled, if possible, with what we have seen above of Justin’s beliefs. 
Though earlier chapters of Acts do not speak of Paul talking about the General Resurrection, (though he made much of Christ’s resurrection), his speech to the philosophers on Mars’ Hill, includes the declaration that judgement is ordained through “that man”, of which the proof is that “he hath raised him from the dead.” Obviously, that judgement could not come about unless men were raised from the dead, so the general resurrection is inferred here (Acts 17:31).