"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. Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works? And then will I profess unto them, I never knew you: depart from me, ye that work iniquity", (Matt. 7:21-23).
Many people flippantly speak of Jesus Christ as "the Lord" without ever yielding their hearts & lives to His actual lordship. "Lord" is from the Greek "kurios" and suggests "power, or authority". It is used of: one who owns something, or has it at his disposal; one to whom service is due; an emperor or king. It is further used as a title of respect in addressing one's father or husband. It is equivalent to the word "Jehovah" in the Old Testament, (Matt. 4:7). No one can truly acknowledge Jesus Christ as LORD except through the Holy Spirit; talk is cheap! (I Cor. 12:3)
In the day of judgment many will claim to have done many wonderful and marvelous things "in Jesus