Keeping it simple: ‎"One Lord, one faith, one baptism."

Truth is simple, and without confusion or contradictions. Truth is absolute, and not subject to change. There is no such thing as relative truth (relativism): God is the Truth:

The Truth is not an abstract idea or thought. The Truth is a Person. I am the Truth,Christ announced. He did not say,"I came to tell you a few nice things about truth to help you along" He said; I am the Way & the Truth & the Life! (John 14:16)

Same Lord, yet diametrically opposed beliefs?
Same Lord, different Christological teaching?
Same Lord, different doctrine?
Same Lord, different spirit?
Same Lord, different faith?
Same Lord, different practices?
Same Lord, different mind-sets/accord?
Same Lord, different accountability?
Same Lord, different voice?
Same Lord, different ecclesiology?

Same Lord, different theology?

Same Lord, different soteriological teachings/methods of salvation, purity, enlightenment etc.?

"Is Christ divided?" (1 Cor 1:13)

No, then why do some dismember Him?

"Jesus Christ is the same yesterday, today, and forever;" (Heb 13:8)

Why do some wish to change His teachings and way, to their teachings and ways?

"These all continued with one accord in prayer and supplication" (Acts 1:14) "that you stand fast in one spirit, with one mind striving together for the faith of the gospel;" (Phil 1:27)

God is not an author of confusion; a revealer of contradicting beliefs; a giver of deception; a skitso, lunatic, liar and ever-changing, watered down mere man with no authority, but fully Perfect-God and fully Perfect-Man, Who does not teach diametrically opposed beliefs, or create warring factions/sects and heresies...

"you should earnestly contend for the faith which was once and for all delivered unto the saints." (Jude 1:3)

• 'THE FAITH' = Singular, 1;t
• 'WAS' = it 'was' given... describing a specific event/point of time in history, a revelation in the past.
• 'ONCE' = A 1 time event that has already taken place once.
• 'AND FOR ALL DELIVERED' = this event/revelation has not, will not and cannot take place again.
• 'UNTO THE SAINTS' = the lower case 's' saints, refers to those who are baptized/chrismated and members of His One, Holy Universal, Apostolic Church and unchanged faith. It is these saints (believers, Orthodox Christians), who hold unto the ancient, unchanged, original faith, which does not change as time goes by, for it is timeless and perfect.

Same Lord, separate paths/ways?

ONE WAY = "I AM The Way, The Truth and the Life" (John 14:6)

Remember... Our and Saviour Jesus Christ and His Apostles warned us, that even if an angel was to come and preach "another gospel" to reject him, and let him and his teaching be "anathema" (eternally damned).  Elsewhere we are warned of false prophets, false apostles, false brethren and false Christ's... And today's 40,000+, 'Christian' sects/ideologies, do just that, teach a false doctrine which promotes a false Christ and another 'way'.

His Holy Word also warns us strictly, against giving private interpretations and not holding fast to Sacred Tradition, and Sound/Orthodox Doctrine. Therefore, we must be very careful/vigilant and 'wise as serpent', having discernment, and seeking guidance, just as the Ethiopian Eunuch did, with Apostle Philip in the Book of Acts.