Concerning the genesis of Christianity and the written word of God…
The Council of Nicaea has nothing to do with Christianity. Christianity is representative of the Gospel (Good News) of Jesus Christ and that Gospel was ordained “before Time began” (2 Timothy 1:8-10); Christianity has nothing to do with Constantine or Catholicism or Denominations or Sects or Religion or Cults or the will of mankind.
The Biblical Text, from the Genesis to the Revelation, has nothing to do with the will of humanity and everything to do with the will of our omnipotent Creator who has provided His human creation with the EXACT words He desires we have in order that we can know Him personally; love Him intimately; live with Him eternally and know His eschatological will and purpose for Time and Eternity.
Christianity is a covenant relationship with God the Father by grace (unmerited favor) through faith-trust-belief in Jesus Christ as our Messiah. The only “Council” of relevance concerning Christianity is the “Jerusalem Council” formed by Jesus’ Apostles to announce the parameters of what was mandated for Gentile believers having trusted in Jesus as their Lord, Messiah, God (Acts 15).
Christianity provides humanity the only Way, the only Path, the only Truth, the only LIFE, available in this life constrained by Time and the life to come in Eternity (John 14:6). Jesus Christ as God, Creator, Messiah, Judge, and the indwelling Holy Spirit as “Guarantor” of Covenant Relationship with the Father is the only HOPE for sinful humanity concerning forgiveness of sin, eternal life (John 3; John 14:6; Ephesians 1:13-14; Acts 4:12; Hebrews 8:12).