In Jesus' first coming he came as a Savior, but in His second coming He will return as Judge.  Oftentimes people will acknowledge that Jesus existed and was a good man, but Jesus was more than just a man He was the Christ.  During His first coming people saw Jesus veiled in human flesh, but one day Jesus will be seen in His glorified state and there will be no where to run or hide for those who names are not written in the book of life.