There shall be no night there: They need no lamp nor light of the sun, for the Lord God gives them light. And they shall reign forever and ever. (Revelation 22:5) "NKJV"
There shall be no night there: ignorance is defeated
The Lord God gives them light: God gives them understanding
Wisdom without understanding is useless; where there is no understanding, there is no resurrection from the dead.
The Lord will enable you to understand it all. (2 Timothy 2:7) "GNT"
Lack of understanding was the reason why humans were separated from God. Lack of understanding is described as follows,
“God made their minds and hearts dull; to this very day they cannot see or hear.” (Romans 11:8) "GNT"
They cannot see: they lacked understanding
Man has the ability to free himself of sin only if he has understanding of the hidden wisdom of God. Substituting reasoning with frequent prayers and requests for the forgiveness of sin implies lack of understanding.
and make them bend under their troubles at all times.” (Romans 11:10) "GNT"
May their eyes be blinded: may they not understand
That they cannot see; and make them bend under their troubles at all times: lack of understanding will cause them to beg for their sins always.
Without understanding man can't comprehend the wisdom of God required to free mankind from the bondage of sin. This is where the mercy of God comes in.
Through mercy, understanding comes from God into the hearts and minds of humans.
Therefore everyone is able to comprehend and appreciate the wisdom of God through the entry of understanding into the hearts and minds of human beings. Understanding the wisdom of God is what it means to know God.