One cannot obtain salvation and remain in ignorance to the Word. Once a person is born again, the Holy Spirit guides him/her into the Truth - which is in Jesus Christ.
How can you reconcile Jesus Christ as being the only begotten of the Father is one breath, then in another say He was a spiritual brother to Satan, just as we are?
Satan isn’t mortal, never was and never will be. Jesus became flesh - In the beginning was the Word, and the Word was with God and the Word was God and the Word became flesh. You’ll find this in 1 John.
“One cannot obtain salvation and remain in ignorance to the Word. “
What happens to everyone else?