Will there be a falling away?
Matthew 24:4-12; Acts 20:29,30; 2 Thess 2:3-12; Hebrews 3:12; 5:11-6:8; 10-26-31; 2 Peter 3:3; 1John 2:18; Jude 18.

So what is the essential Christian Doctrine:
God’s scripture is inerrant, sufficient, and finished.
There is one triune God
Christ was born of a virgin
Christ lived a sinless life
Christ lived as both God and man
We cannot save ourselves, but by grace alone through faith alone in Christ alone.
Christ’s blood was shed to atone for your sins
Christ was resurrected
Christ ascended to sit at the right hand of God
Christ is coming again!