Consider this…

There are two ways to be fooled.

 
One is to believe what isn't true;

the other is to refuse to believe what is true.
Soren Kierkegaard (1813-1855)

"The greatest deception men suffer is from their own opinions."
LEONARDO DA VINCI

“All truths are easy to understand once they are discovered; the point is to discover them.” Galileo Galilei, Italian physicist, astronomer

“ The truth that makes men free is for the most part the truth that men prefer not to hear.” H. Agar,  journalist

“Watch therefore, for you know neither the day nor the hour in which the Son of Man is coming.”

 ~Jesus  Matt 25:13

"Every man must do two things alone; he must do his own believing and his own dying." ~ Martin Luther

"It ain't what you don't know that gets you into trouble. It's what you know for sure that just ain't so.”  ~ Mark Twain

And have no fellowship with the unfruitful works of darkness, but rather expose them.    Ephesians 5:11

“The prophets prophesy falsely, and the priests rule by their own power; and My people love to have it so” (Jer 5:31).

"The ultimate ignorance is rejecting something you know nothing about."     ~ Anonymous

All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness. 

2 Tim 3:16

"All Truth passes thru three stages: First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as self-evident. Arthur Schopenhauer

"Truth mixed with error is equivalent to all error, except that it is more innocent looking and, therefore, more dangerous." ~ H.A. Ironside

The greatest want of the world is the want of men,--men who will not be bought or sold; men who in their inmost souls are true and honest; men who do not fear to call sin by its right name; men whose conscience is as true to duty as the needle to the pole; men who will stand for the right though the heavens fall.— EGW - Education, p. 57.

Love not the world, neither the things that are in the world. If any man love the world, the love of the Father is not in him. 

1 John 2:15

The most damnable of all false teachers is the teacher that explains away one portion of the Bible while professing to accept it all. “We may disguise poison by mingling it with wholesome food, but we do not change its nature. On the contrary, it is rendered more dangerous, as it is more likely to be taken unawares. It is one of satan's devices to combine with falsehood just enough truth to give it plausibility”      (GC 587).

Being confident of this very thing, that He which hath begun a good work in you will perform it until the day of Jesus Christ: Philippians 1:6