This is deadly serious stuff today. No joke.
Remember we don’t judge—God does the judging. Jesus himself is the judge in this passage.
Remember that the path to the kingdom is narrow and arduous. Remember that there are people along the way who will give you bad directions and advice about the path.
Now look at this passage. In this passage, the kingdom is seen as in the future. There will come a day when followers of Jesus will enter the kingdom and others will not.
Note that you cannot tell who will be in and who will be out by what they say, and to some extent even by what they do. They may say that Jesus is their Lord—and this is the first instance in Matthew where Jesus is addressed as such—but that may not be the truth. They may even appear to be doing great things for Jesus. Building great churches and organizations, feeding the hungry, preaching, baptizing. But way down underneath they are not obeying Jesus.
That is what matters. Not what you say. Not even what you do, except in obedience to Jesus.
It is unpopular today in some church quarters to talk about what we do. Jesus didn’t have any qualms about it.
“… only the one who does the will of my Father in heaven…” will enter the kingdom of heaven.
Chew on that a while.