But they mocked the messengers of God, despised His words, and scoffed at His prophets, until the wrath of the LORD arose against His people, till there was no remedy.  ~2 Chronicles 36:16

The wicked in his proud countenance does not seek God; God is in none of his thoughts.  ~Psalm 10:4

People who reject God and the truths found in His Word, all share that common trait; they do not know Him. In fact, knowing God or understanding His truth is nowhere on their list of things-to-do. People may know of God and even acknowledge His existence, but their actions and rejection of the Gospel betray their self willed ignorance of Who He really is.

He has said in his heart, "God has forgotten; He hides His face; He will never see."  ~Psalm 10:11

The most frustrating witnessing encounters I have had are with those people who will acknowledge God and agree with everything the Scripture says, yet reject Christ. The reason they give always reveals the "god" they know is not God Almighty revealed in the Bible and the person of Jesus Christ. Even if you give them biblical proof their concept of God is in error, they stubbornly cling to their own "god". It is evident their change of mind and heart can only come from divine intervention.

All things have been delivered to Me by My Father, and no one knows the Son except the Father. Nor does anyone know the Father except the Son, and the one to whom the Son wills to reveal Him.  ~Matthew 11:27

Only by God's sovereign power can anyone come to know Him in a saving way. Scripture reveals that mankind rejects the knowledge of God and seeks to usurp His rule over creation. All of us have bought the lie that we can be God and we need not subject ourselves to anyone else. How merciful that Jesus Christ reveals God to even one sinner. The promise that was given to those who know God and seek Him will not be forsaken.

And those who know Your name will put their trust in You; for You, LORD, have not forsaken those who seek You.  ~Psalm 9:10