A question begged by biblical typology (see my previous post)--and several New Testament texts themselves--is the degree to which the church, as the covenant people of God, is analogous to Israel prior to Christ's death and the outpouring of the Holy Spirit at Pentecost. Listen to what Paul writes in 1 Corinthians 10:
I want you to know, brothers, that our fathers were all under the cloud, and all passed through the sea, and all were baptized into Moses in the cloud and in the sea, and all ate the same spiritual food, and all drank the same spiritual drink. For they drank from the spiritual Rock that followed them, and the Rock was Christ. Nevertheless, with most of them God was not pleased, for they were overthrown in the wilderness.
Now these things happened as examples [tupoi, "types"] for us, that we might not desire evil as they did. . . . Now these things happened to them as an example [tupos], but they were written down for our instruction, on whom the end of the ages has come. Therefore let anyone who thinks that he stands take heed lest he fall. (vv. 1-12)
Note that Paul uses language of the Christian sacraments of baptism and the Lord's Supper to describe the experience of Israel in the wilderness. He is reading back present-day experiences into the life of ethnic Israel 1400 years earlier, who foreshadowed the global people of God. Despite being delivered from Egypt and sharing in the goodness of God's presence and nourishment, they failed to enter the promised land because they set their hearts on evil desires. Nonetheless, these were those who had been "baptized into Moses in the . . . sea." They were those whom God had saved in the exodus, and they had come under the leadership of Moses and the covenant put into effect through his mediation. Paul seems to be warning the baptized new covenant church, delivered from bondage to sin and under the leadership of Jesus. He warns that if they likewise presume upon their religious privileges and the gifts of God (particularly in worship and sacrament, as chapters 10-11 of 1 Cor. unfold), but do not embody obedient faith and repentance from idols, they will fall under God's judgment (cf. Deut. 29:18-21) and "fall in the desert."
In similar fashion the author of Hebrews issues dire warnings of God's judgment upon those who have experienced Christian teaching, nurture, and worship and have made some profession of faith, and then have fallen away (2:1-4; 3:7-4:13; 6:4-8; 10:26-31; cf. similar warnings in Num. 15:30-31; Deut. 29:18-21).
The question I have is this: Is this faithless idolater a person who is a member of the new covenant people of God? I think Scripture is clear that all genuine believers are sealed by the Holy Spirit for the day of redemption (Eph. 1:13-14; 4:30; 2 Cor. 1:21-22), are kept from stumbling by Jesus Christ (Jude 24-25; John 10:28-29), and remain faithful because Christ's death has secured it (Col. 1:21-23). Apostates are not recipients of the promised new covenant blessings of faith and love towards God, the seal of the Spirit, and forgiveness of sins, because they fail to meet its condition (persevering, repentant faith). But nonetheless in Hebrews 10:29 we read that there are those who've trampled Christ underfoot, who have "profaned the blood of the covenant by which [they were] sanctified" (v. 29), and who belong to God's people and will be judged accordingly (v. 30). Such passages appear to indicate that someone can belong to the covenant and thus set apart (sanctified) to God, at least externally, by virtue of an empty profession of faith (Heb. 4:14; 10:23).