"God told me..."
John 17:17 "Sanctify them through thy truth: thy word is truth."
The word of God is truth, and the thrice holy God who inspired the words in the 66 books of the Holy Bible cannot deviate from the absolute truth, not even by one jot or one tittle. The bottom line is that there is such thing as absolute truth. But then, how do we know whether God did or did not reveal himself to a person?
Hebrews 1:1-2 "God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets, 2 Hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds;"
There are two things shown to us in this passage:
God hath in time past, spoken by the prophets;
God hath in these last days, spoken unto us by his Son.
John 1:1 "In the beginning was the Word, and the Word was with God, and the Word was God."
The Son of God (Jesus Christ) is the Word of God according to this passage of Scripture. Jesus Christ is living Word, and the living Word, who is God himself, has an immutable nature about him, much like the words written in a book which cannot be altered.
Revelation 19:10 "… for the testimony of Jesus is the spirit of prophecy."
John tells us that the testimony of word of God in the 66 books of the Holy Bible is the Spirit of Jesus Christ. The living God is the spiritual form of the written word, and the written word is the physical form of the Spirit of the living God. One cannot be decoupled from the other.
John 18:20 “Jesus answered him, I spake openly to the world; I ever taught in the synagogue, and in the temple, whither the Jews always resort; and in secret have I said nothing.”
So, if God hath in these last days spoken unto us by his Son, it is God speaking through the 66 books of the Holy Bible. God will never at any time appear to a believer and tells him something, and then appear to another believer and tells him a different thing. God cannot deviate from the words that he has inspired. In fact, his word is already out there in the open. Anybody can just go and check it out for themselves. It will be the same, whether one believer reads it or another believer reads it.
1 Corinthians 14:33 "For God is not the author of confusion, but of peace, as in all churches of the saints."
God is not the author of confusion. He will never say one thing to a believer and another thing to another believer. He will never contradict himself. He will never appear to someone and speak to him in private, but he says in Hebrews 1:2 that he hath "in these last days spoken unto us by his Son".
2 Timothy 3:1 "This know also, that in the last days perilous times shall come."
There are many wannabe prophets and apostles in these last days who like to claim that the Holy Spirit has visited them in private. They like to use the words "God told me…" to glorify themselves in that what they say is the absolute truth, when in reality, it is only their fleshly lusts in them wanting to be special, and their pride that has deceived them. (Obadiah 1:3)
Proverbs 30:5-6 "Every word of God is pure: he is a shield unto them that put their trust in him. 6 Add thou not unto his words, lest he reprove thee, and thou be found a liar."
In saying "God told me…," they have inevitably made their own words as authoritative, if not more authoritative than the written word of God. While it is all very subtly said and done, they have in fact made themselves a "pope" (vicar of Christ) in the process. The fear of the LORD is not in these Christians. Instead, the spirit of antichrist is found in their words.