The wise, the scribe & the disputer became vain in their imaginations

1 Corinthians 1:20 Where is the wise? where is the scribe? where is the disputer of this world? hath not God made foolish the wisdom of this world?

The knowledge of men is nothing compared to the wisdom of GOD.

1 Corinthians 1:25 Because the foolishness of God is wiser than men; and the weakness of God is stronger than men.

Not until your reasoning is based on the wisdom of God written in the bible, you're in vain imaginations.

Matthew 13:13 Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand.

It is wise then not to based your reasoning with your own understanding & many of us are like that. All doubts & questions regarding your salvation can be all justified by the scripture.

2 Timothy 3:16 All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:

For only the believers of Christ that the mystery of the kingdom of God is made known.

Mark 4:11 And he said unto them, Unto you it is given to know the mystery of the kingdom of God: but unto them that are without, all these things are done in parables:

And for the unbelievers;

Romans 1:21 Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.

Turn from your wickedness first before attempting to read the scripture, for if you don't, you will never understand it. I mean, how can you understand if you are a womanizer, drunkard, gambler, reviler etc. etc.

Daniel 12:10 Many shall be purified, and made white, and tried; but the wicked shall do wickedly: and none of the wicked shall understand; but the wise shall understand.