Most have greeted someone they know with the wrong name. However, it is even more embarrassing to warmly greet someone by name and discover they are a different person entirely, and you have never known them. Hey, we are human and can easily make those sorts of mistakes. Right?
However, the worst of the worst is to not “recognize/know” God for Who He really is as revealed in Scripture. Many have shared their understanding (picture) of God, and sadly, that isn’t the God of the Bible. Their God is all loving, merciful, and forgiving Who excuses, understands, and winks at their sin. That is a god of their own creation, only partially correct. The God of Scripture is also just, holy, and righteous. As such, God hates and must punish sin.
“These things hast thou done, and I kept silence; thou thoughtest that I was altogether such an one as thyself: but I will reprove thee, and set them in order before thine eyes” (Psalms 50:21).
“Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven” (Matthew 7:21).