“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 They claim to know God, but by their actions they deny him. They are detestable, disobedient and unfit for doing anything good.Titus 1. Natural knowledgeThe Bible says only a fool claims there's no God.2. Intellectual knowledge3. Experiencial knowledgeIf you actually want to know God.....1. Saving knowledgeNow this is eternal life: that they know you, the only true God, and Jesus Christ, whom you have sent.John