"...What is a 'True Christian'?
By 'True Christian' I'm asking for beliefs, actions, once saved - always saved, believe in immaculate conception, belief in the word only, etc, that would make up the ideal human believer that Jesus would approve of..."
In John 3:1-8, Jesus discusses one of the fundamental doctrines of the Christian faith: regeneration (Tit. 3:5) or spiritual birth. Without the new brith one cannot see the kingdom of God, i.e., receive eternal life and salvation through Jesus Christ which is necessary in being a "True Christian." The following are important facts concerning regeneration.
(1) Regeneration is a re-creating and tranformation of the person (Rom. 12:2) by God the Holy Spirit (Jn. 3:6). Thriough this process eternal life from God Himself is imparted to the believer (Jn. 3:16), and he becomes a child of God (Jn. 1:12) and a new person (II Cor. 5:17). He no longer conforms to this world (Rom. 12:2), but is now created after God "in righteousness and true holiness" (Eph. 4:24).
(2) Regeneration is necessary because apart from Christ, all people, by their inherent natures, are sinners, incapable of obeying and pleasing God (Rom. 8:7-8).
(3) Regeneration comes to those who repent of their sin, turn to God (Mat. 3:2), and place personal faith in Jesus Christ as Lord and Saviour (Jn. 3:16).
(4) Regeneration involves a transition from an old life of sin to a new life of obedience to Jesus Christ (Heb. 5:9).
(5) The "True Christian" cannot make sin a habitual practice in his life (I Jn. 3:9). That is, one cannot remain a "True Christian" without a sincere desire and victorious endeavor to please God and to avoid evil (I Jn 1:5-7).
(6)Those who do live in immorality and follow the world's ways (I Jn. 2:15-16), whatever they profess, demonstrate that they are still unregenerated and children of Satan (I Jn. 3:6-10).
(7) Just as one can be born of the spirit by receiving the life of God, he can also extinguish that life by ungodly choices and unrighteous living, and hence, die spiritually. Scripture affirms, "if ye live after the flesh, ye shall die" (Rom. 8:13). Thus, sin and the refusal to follow the Holy Spirit extinguish the life of God in the soul of the Christian and causes spiritual death and exclusion from the kingdom of God (Heb. 6:4-6).
(8) Regeneration cannot be equated with physical birth, for the relationship of God with the Christian is a matter of spirit rather than flesh (Jn. 3:6). Hence, while the physical tie of a father and son can never be annulled, the father and son relationship which God desires with us is voluntary and not indissoluble during the Christian's probationary time on earth (Rom. 8:6a & 13a). The Christian's membership in God's family remains conditional on their faith in Christ throughout their earthly existence, demonstrated by a life of sincere obedience and love (Rom. 8:12-14).