You do not understand the concept for one important reason, the Holy Spirit is not with you. How can you understand the way of God when you have turned from Him?
His knowledge does not negate our desire or desicison about our lives. In other words, if i make the choice to sin then that is my free will to do so. God's knowledge of what I am going to do is not going to impact my choice.
There's some biblical teaching for this principle as to why the spiritual is silly and not understood:
1 Corinthians 1:18
[
The Wisdom of God]
For the word of the cross is foolishness to those who are perishing, but to us who are being saved it is the power of God.
19 For it is written,
"I WILL DESTROY THE WISDOM OF THE WISE,
AND THE CLEVERNESS OF THE CLEVER I WILL SET ASIDE."
1 Corinthians 1:20
Where is the wise man? Where is the scribe? Where is the debater of this age? Has not God made
foolish the wisdom of the world?
21
For since in the wisdom of God the world through its wisdom did not come to know God, God was well-pleased through the foolishness of the message preached to save those who believe.
God KNOWS the message of salvation is simple - and it's on purpose in that simplicity.
1 Corinthians 2:14
But a natural man does not accept the things of the Spirit of God,
for they are foolishness to him; and he cannot understand them, because they are spiritually appraised.
John 8:
42Jesus said to them, "If God were your Father, you would love Me, for I proceeded forth and have come from God, for I have not even come on My own initiative, but He sent Me.
43
"Why do you not understand what I am saying? It is because you cannot hear My word. 44"You are of your father the devil, and
you want to do the desires of your father He was a murderer from the beginning, and does not stand in the truth because there is no truth in him Whenever he speaks a lie, he speaks from his own nature, for he is a liar and the father of lies.
Mat. 11:
24 "Nevertheless I say to you that it will be more tolerable for the land of Sodom in the day of judgment, than for you."
Come to Me
25At that time Jesus said, "I praise You, Father, Lord of heaven and earth, that
You have hidden these things from the wise and intelligent and have revealed them to infants
Romans 1:21
For even though they knew God, they did not honor Him as God or give thanks, but they became futile in their speculations, and their foolish heart was
darkened.
Eph 4:17-19
17 So this I say, and affirm together with the Lord, that you walk no longer just as the Gentiles also walk,
in the futility of their mind,
18
being darkened in their understanding, excluded from the life of God
because of the ignorance that is in them, because of the hardness of their heart;
19 and they, having become callous,
have given themselves over to sensuality for the practice of every kind of impurity with greediness.
Mt. 13:
10And the disciples came and said to Him, "Why do You speak to them in parables?"
11 Jesus answered them, "To you it has been granted to know the mysteries of the kingdom of heaven, but to them it has not been granted.
12 "For whoever has, to him more shall be given, and he will have an abundance; but whoever does not have, even what he has shall be taken away from him.
13 "
Therefore I speak to them in parables; because while seeing they do not see, and while hearing they do not hear, nor do they understand.
14"In their case the prophecy of Isaiah is being fulfilled, which says,
'YOU WILL KEEP ON HEARING, BUT WILL NOT UNDERSTAND;
YOU WILL KEEP ON SEEING, BUT WILL NOT PERCEIVE;
15FOR THE HEART OF THIS PEOPLE HAS BECOME DULL,
WITH THEIR EARS THEY SCARCELY HEAR,
AND THEY HAVE CLOSED THEIR EYES,
OTHERWISE THEY WOULD SEE WITH THEIR EYES,
HEAR WITH THEIR EARS,
AND UNDERSTAND WITH THEIR HEART AND RETURN,
AND I WOULD HEAL THEM.'
16 "But blessed are your eyes, because they see; and your ears, because they hear. 17 "For truly I say to you that many prophets and righteous men desired to see what you see, and did not see it, and to hear what you hear, and did not hear it.
Many verses show us why people will continue to reject the simple message of the cross - basically, it's TOO simple for them to accept... and they prefer to be their own gods... so be it.