The concept of the Trinity has baffled mankind for centuries. One reason it confused people was because its concept differed from the norm. While it seems we can easily envision God creating a man from dust, the same is not true when we attempt to envision Him making a Man from some other element. The truest test for proving Godly things is by comparing them with biblical truths. The Bible never recorded God stating He would never make a man from a different substance than from the dust of the ground. Therefore, since Jesus stated He came down from heaven, He could not have been made from the dust of the ground as is mortal man. His originality had to come from a heavenly substance.
A Bible verse that seems insignificant in its context at first until you reread it is Deuteronomy 29:29: "The secret things belongs unto the Lord our God, but the things which are revealed belong to us and to our children forever." The question to ask here is, "Why do secret things exist, which belong solely to God?" The reason is, because they are not found in the Bible. If something is not written in the Bible, only God knows. This reality comes to light when we reason why Jesus (even though He is God) does not know the day or hour of His coming back to earth. The Bible does not record the day or hour of this event. Now that God has revealed to us the substance He used as the seed of the Holy Ghost that was implanted directly into the womb of the Virgin Mary, this verse makes much more sense.
(See: "The Unveiling of the Trinity" )
That principle also applies to the second half of Deuteronomy 29:29, which states that the revealed things belong to us and our children forever. Many Scriptures declare our inability to know the things of God unless He reveals them to us, and He reveals to us through His Spirit dwelling in the heart of the believer. God never said His Trinity was a mystery--man did. The Trinity is found everywhere in the Bible, even in the Old Testament. However, God chose not to reveal His Trinity to us until these last days. Since the Trinity is recorded throughout the Bible, it had to be revealed as His Word declares.
Why is there so much backlash against the Trinity? The simple answer is Satan. Satan initiated the need for the Trinity in the Garden of Eden. The Bible also declares Satan entered into the heart of Judas when he betrayed Jesus. The Book of Revelation depicts Satan doing his evil work of deceiving people in the end times. Click here to see how Satan does his evil.