"I have been shown that it is the device of the enemy to lead minds to dwell upon some obscure or unimportant point, something that is not fully revealed or is not essential to our salvation. This is made the absorbing theme, the 'present truth,' when all their investigations and suppositions only serve to make matters more obscure than before, and to confuse the minds of some who ought to be seeking for oneness through sanctification of the truth." - 14 MR
One of Satan's great deceptions is to divert our focus from that which truly matters to that which is not essential. Let us all beware of these deceptions and heed Ellen White's counsel. Let us focus on our Lord, Jesus Christ.
"Satan beguiles men now as he beguiled Eve in Eden by flattery, by kindling a desire to obtain forbidden knowledge, by exciting ambition for self-exaltation. It was cherishing these evils that caused his fall, and through them he aims to compass the ruin of men." - GC p. 554
There is a measure of pride associated with going off after fanatical doctrines and with feeling like you are privy to some exclusive, private or secret knowledge or interpretation of the Bible or, more specifically, prophecy.
This can be seen all around us with such groups as the "Shepherd's Rod" and the "Seventh-day Adventist Reform Movement," as well as those who promote such things as the 2520 "prophecy," the keeping of feast days, the pronouncing of the Father and Son's names in Hebrew only, the lunar Sabbath, the idea that God won't destroy anyone in hell, the idea that Jesus was created, the idea that the Holy Spirit is not part of the Godhead, the idea that it's a sin to shave your beard...and the list goes on and on and on.
The devil is working...but God is also working. No one is being deceived against their will. But when they've made the decision to persistently turn away from truth that God is impressing upon their hearts...He will allow them that which they wish. The end will be as follows:
"The coming of the lawless one is according to the working of Satan, with all power, signs, and lying wonders, and with all unrighteous deception among those who perish, because they did not receive the love of the truth, that they might be saved. And for this reason God will send them strong delusion, that they should believe the lie, that they all may be condemned who did not believe the truth but had pleasure in unrighteousness." - 2 Thessalonians 2:9-12
Once someone has lost a love of the pure truth, they will be blown about by every wind of doctrine. So hold fast the anchors of truth which have been given to us by God. Such is also the advice of God through Paul:
"Therefore, brethren, stand fast and hold the traditions which you were taught, whether by word or our epistle." - 2 Thessalonians 2:15