Question: The warnings not to be deceived and fall away or depart from the faith by Jesus (Mat. 24:4-5, 10) by the Holy Spirit (1 Tim. 4:1) by Paul (2 Thes. 2:3-4) by Peter (2 Pet. 2:1) and by John (1 John 3:7), are these for the saved or the unsaved?

Answer: Only a saved person can be deceived and fall away or depart from their faith by rejecting the doctrine of Christ (2 Tim 4:3-4, 2 John 1:9))! An unsaved person can't sever a faith they never had. This is why pastors insisting a believer that takes the mark of the beast is still saved are teaching heresy! This is a doctrine of demons (1 Tim. 4:1)