“Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but only the one who does the will of my Father who is in heaven.
Matthew 7:21 NIV
They claim to know God, but by their actions they deny him. They are detestable, disobedient and unfit for doing anything good.
Titus 1:16 NIV
1. Natural knowledge
The Bible says only a fool claims there's no God.
2. Intellectual knowledge
3. Experiencial knowledge
If you actually want to know God.....
1. Saving knowledge
Now this is eternal life: that they know you, the only true God, and Jesus Christ, whom you have sent.
John 17:3 NIV