I find it challenging to understand how individuals assign specific labels or doctrinal requirements to themselves, implying that one must adhere to certain beliefs in order to be considered part of the faith.
Well, the Bible sets out all sorts of beliefs and practices for the Christian either to avoid or to adopt. Some of these beliefs, though, are more...tertiary, they "orbit" the core of the Christian faith, like the moon around the earth, having an effect on Christian thinking but not of an essential, vital sort.
- Dispensationalism vs. Covenantalism.
- Eschatology (e.g. pre-mill, a-mill, post- mill., full-preterist, partial preterist, supersessionism, etc.)
- Form of baptism (sprinkle, pour, immerse).
- The Great Flood: Global or regional?
- The age of the earth.
And so on.
Unfortunately, some Christians take up "majoring in the minors," they "make (doctrinal) mountains out of mole-hills," inflating secondary truths to a status out of proportion to what the truths are given in God's word.
Why? I think some of the time doing this makes the one who's doing it more prominent, a sort of self-appointed belief-regulator, who stands in Christ's place separating out the "goats" from the "sheep" on the basis of their own personal dogma. Usually, when this is the case, there is some pretty serious distortion of God's truth going on.
Having said all this, there
are some non-negotiables of the faith, certain truths that must not be ignored, or distorted, the holding of which distinguishes a person as "of the faith."
- Jesus is God (
Col. 1:13-22; 2:9-10; Jn. 1:1-4; 10:30).
- Jesus died on the cross in sacrificial atonement for the sins of all mankind, past, present and future (
1 Co. 15:3-4; 1 Jn. 4:9-10; 2 Co. 5:21; He. 7-10:22).
- Jesus rose from the dead in vindication of his claims to be divine (See all four Gospels).
- Salvation can only be found in the Saviour and in trusting in him as such and submitting to him as one's Lord (
Ro. 10:9-10; Jn. 3:15-16).
- the Bible is the divinely-inspired word of God, sufficient to establish for all believers their beliefs and practices as believers. (
2 Ti. 3:16-17; Ps. 1, 119, Matt. 4:4)
And so on.
God calls His own to both promulgate and defend the "non-negotiables" of the faith (
1 Pe. 3:15; Matt. 28:19-20), regarding as accursed any who attempt to distort the Gospel (
Ga. 1:8), and fighting off the "ravening wolves" prowling always around the Church (
Ac. 20:29-30; Jude 1:4-19).