Hebrews 6:4-6

For it is impossible in the case of those who have once been enlightened, tasted the heavenly gift, become partakers of the Holy Spirit,  tasted the good word of God and the miracles of the coming age,  and then have committed apostasy, to renew them again to repentance, since they are crucifying the Son of God for themselves all over again and holding him up to contempt.

This verse has some weight. This is strong language in the context of a warning about falling away from faith in Jesus Christ. It is my belief that in order to “fall away” a person must reject Jesus Christ as the necessary way to right relationship with God. More context confirms that these Christians have come from a Jewish background, and some of them are returning exclusively to a belief system founded upon religious practices, turning away from Jesus Christ as the chief cornerstone of their faith in God. This kind of hardness of heart, shields them from recognizing that they have a need to repent, and that Jesus Christ is THE centerpiece and THE atonement for that restorative entrance into right relationship with God. Jesus says, “I am the way, the truth, and the life. No one comes to the Father except through me.” (John 14:6)