Those who have not studied the doctrine of the trinity never see it as a salvation issue because they do not understand exactly what it entails and all the implications. And so they typically have no idea that this is actually the biggest deception of all that is also related to the mark of the beast and the Sabbath day.
Remember that the trinity doctrine teaches a 3 in 1 and 1 in 3 god. That is, 3 gods that are co-equal, co-eternal that are not 3 gods but 1 god. 1+1+1=One. Three gods that have supposedly always existed and hence have no beginning. So how can Jesus be a literal Son if He has always existed alongside the Father? And how can the Father be a Father if Jesus is not really His Son? Hence the trinity doctrine and other similar beliefs like Unitarians deny that Jesus is the literal Son of God in one way or another.
If you do not confess Jesus is the Son of God than you are separated from God. “Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God.” 1 John 4:15. And again, “Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?” 1 John 5:5
And if you deny Jesus is the Son of God and that God gave His literal Son then you make God a liar and you do not have eternal life. “He that believeth on the Son of God has the witness in himself: he that believeth not God has made him a liar; because he believeth not the record that God gave of his Son. And this is the record, that God has given to us eternal life, and this life is in his Son. He that has the Son has life; and he that has not the Son of God has not life.” 1 John 5:10-12
“But these are written, that you might believe that Jesus is the Christ, the Son of God; and that believing you might have life through his name.” John 20:31
And so Scripture tells us that it is only by acknowledging that Jesus is the Son of God that we can be saved and have access to the Father. And if you deny Jesus is the literal Son of God then it is also impossible for God to be a literal Father. So it denies both the Father and the Son which is what John called antichrist as it opposes Christ being the true and literal Son of God. It denies that it was the literal Son of God that came in the flesh and died on the cross.
The Bible reveals over and over again that they are a real Father and Son. But the trinity doctrine says no. Some today including Adventist Pastors when asked is Jesus the Son of God reply, No! They say He is just the one God playing the role of the Son. Yet nowhere is there even so much as a hint in Scripture that they are just role playing or are not really a Father and Son. God brought forth a Son whom He loves very much and Satan is working very hard to hide this fact.
And if the trinity doctrine is wrong, the Holy Spirit is really a creation of Satan rather than the Spirit of the Father and Son. Does it matter if we give our adoration to a creation of Satan rather than the Spirit of the Father and Son? The answer is obvious. Scripture says Satan wants to be worshipped like the most high God. Has he succeeded in accomplishing his goal of being included as deity? More and more today are praying and worshipping the Holy Spirit which the Bible never tells us to do. If the Holy Spirit is not a third being then what spirit would we have as per our belief and who would we be giving our adoration to? And if we believe the Holy Spirit can be worshipped and prayed to just like the Father and the Son, who receives our worship? It goes to Satan! Do you think the Father and Son will mind? I would hope it requires no explanation.
Revelation 13:17 states, “And that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name.”
Did you notice that it is three things? It is not just the mark of the beast but also the name and the number of his name which is 666. The pagan origins of the trinity reveals that 666 comes from the trinity doctrine and sun and Satan worship!
The question was asked in the Catholic Catechism, “What is Sunday...” The answer was that Sunday “is a day dedicated by the Apostles to the honor of the most holy Trinity.” — (R&H, vol. 5, no. 24, p. 86)
An interesting statement considering “Sunday worship” and the “Trinity doctrine” both came from sun and Satan worship in Babylon, and they were both brought into Christendom by the Catholic Church whom God calls Babylon! They are also both about who we worship which Revelation 13 and 14 reveals is exactly what the mark of the beast issue is all about. So do we worship the one true God on His Holy day or the pagan Catholic 3 in 1 god? And what about the Seal of God. Which God do we need to be sealed by? The one true God the Father or the pagan Catholic 3 in 1 god. This would certainly explain why Revelation reveals so many will still be deceived and perish in the end.
Considering “Sunday worship” and the “Trinity doctrine” were both brought into Christendom by the beast (Papacy), then consider the following.
“The third angel's message has been sent forth to the world, warning men against receiving the mark of the beast or of his image in their foreheads or in their hands. To receive this mark means to come to the same decision as the beast has done, and to advocate the same ideas, in direct opposition to the word of God.” — (E.G. White, R&H, July 13, 1897)
E.G. White says there is still more to be revealed.
“The light that we have upon the third angel's message is the true light. The mark of the beast is exactly what it has been proclaimed to be. Not all in regard to this matter is yet understood nor will it be understood until the unrolling of the scroll,” — (E.G. White, 6T 17.1, 1900)
Christ was the Son of God before coming to earth. “Christ was the only begotten Son of God, and Lucifer, that glorious angel, got up a warfare over the matter, until he had to be thrust down to the earth.” — (E.G. White, Ms86, August 21, 1910)
Satan hates the Son of God and wants us to deny Him and not just for his own gratification. Once you fully understand this topic you will have no trouble seeing that the trinity doctrine is the work of Satan through the Catholic Church for the purpose of stealing your salvation. Is it any wonder Satan has so many workers trying to keep Christians trapped in this satanic doctrine. It is not only the worst possible deception but is also his greatest end time deception related to the mark of the beast.