The key word here is “continue.”
This reminds me of the story of the boy who, as long as he hung onto the tail of the tiger would be safe, but as soon as he would let go he knew he’d be eaten.
The New Testament (NT) does not say that if you stray away from its god ― the Invisible Man in the Sky ― that you can return by undoing your wrongs. The author of Hebrews wrote:
"For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost, And have tasted the good word of God, and the powers of the world to come, If they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame." (Hebrews 6:4-6)
These verses essentially say that a "believer" in Jesus who stops believing, loses his NT salvation and that it is impossible to repent again. This only goes to show that "the 'eternal life' offered by Jesus was only eternal as long as a person believed in him. Evidently it was only temporary 'eternal life' that Jesus had to offer."1
Don't forget that Christians claim the New Testament is the "word of God unto salvation." Many maintain that it is inerrant, infallible. So, there you have it from the horses mouth (Christian horse that is) -- it is impossible, once you stop believing in Jesus..."to renew them again unto repentance."
Christianity mean what it says; does it say what it means? Yes, because once
you deny Jesus, especially the Trinity, according to Hebrew 6, you
are no longer a Christian. Seems as if Christianity follows the mantra
screamed during the
"The way to see by faith is to shut the eye of reason." -Benjamin Franklin (1706-1790)
1. Based on Shmuel Golding; The Light of Reason, volume 4, page 32