Every skeptic and nonbeliever has "an evil heart of unbelief." 3:12
It is impossible for fallen-away Christians to be saved. (Didn't the author know about confession or the finality
of being saved?) 6:4-6
Those who disobeyed the Old Testament law were killed. It will be much worse for those who displease
Jesus. 10:28-29
If you're not a Christian, it's impossible to please God. 11:6
"By faith Noah ... condemned the world, and became heir of the righteousness which is by faith." 11:7
The Israelites kept the passover and sprinkled blood on doorposts so that God wouldn't kill their firstborn children (like he did the Egyptians
in Exodus 12:29).
11:28
God saved Rahab because she believed. (He killed all the non-believers in Jericho.)
11:31