Four New Testament versus (among many others) demonstrate an apostasy and restoration were foretold by all the Old Testament prophets and also in the New Testament.  Acts 3:21 says Jesus the Messiah will not return before a "restoration of all things" or a "universal restoration."  2 Thessalonians 2:1-3 says the Second Coming will not happen before an "apostasy" from the Greek "Apostasia" meaning to divorce, sever, obliterate, destroy or end.  Ephesians 5:5 demonstrates the loss of the idea expressed therein that one must be good, be righteous, to get into heaven.  Colossians 4:16 says one of Paul's letters is missing, the one to the Church in Laodicea.  The Gospel of Thomas, which has authentic saying of Jesus not found in the Bible also shows a loss of scripture.