Matthew 7
[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.[22] 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?
[23] And then will I profess unto them, I never knew you: depart from me, ye that work iniquity.
This sounds like a reasonable approach. It comes with the recommendation of our Creator!
Luke 17
[7] But which of you, having a servant plowing or feeding cattle, will say unto him by and by, when he is come from the field, Go and sit down to meat?[8] And will not rather say unto him, Make ready wherewith I may sup, and gird thyself, and serve me, till I have eaten and drunken; and afterward thou shalt eat and drink?
[9] Doth he thank that servant because he did the things that were commanded him? I trow not.
[10] So likewise ye, when ye shall have done all those things which are commanded you, say, We are unprofitable servants: we have done that which was our duty to do.
Notice the difference in the two situations. The doomed servants are bragging about the stuff they did. They were deceived even by their own actions. It appears they were Christians for the show, to look important and successful in front of other people.
In the second example The servant serves quietly, then proclaims they were of no profit. What is our duty?
1. Love God. Do this by following the 10 commandments.
2. Treat other people how you want to be treated. This is tricky. How many times have you told someone, what I should have done was... the problem is that life occurs in real time and catches us off guard. It's a test designed to see how you respond to various situations.