“Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but the one who does the will of my Father who is in heaven. On that day many will say to me, ‘Lord, Lord, did we not prophesy in your name, and cast out demons in your name, and do many mighty works in your name?’ And then will I declare to them, ‘I never knew you;depart from me, you workers of lawlessness.’” (Matthew 7:21-23)
The alarming and terrifying thing which our Lord says is that not everyone who does say `Lord, Lord’, shall enter into the kingdom of heaven. Those who do go in say it; anyone who does not say it can never enter into the kingdom of heaven; but not all who do say it shall enter in. This is clearly something that should arrest us and cause us to pause. James, in his Epistle, puts the very same point. He warns us to be careful against merely relying upon our belief of certain things, and he puts it like this in a rather startling manner by saying, `The devils also believe, and tremble’ (James ii. ig).
An instance of this is found in the Gospels where we read that certain devils recognized Him and said `Lord, Lord’, but remained devils. We are all in danger of being content with an intellectual assent to the truth. There have been people throughout the centuries who have fallen into this trap. They have read the Scriptures and accepted their teaching. They believed the teaching, and sometimes they have been exponents of the truth, and have argued against heretics. And yet their whole character and life have been a denial of the very truth they have claimed to believe. It is a terrifying thought and yet Scripture so often teaches us that it is a dreadful possibility. A man who is unregenerate and not born again may accept the scriptural teaching as a kind of philosophy, as abstract truth. Indeed, I would not hesitate to say that I always find it very difficult to understand how any intelligent man is not compelled to do that.
If any man comes to the Bible with an intelligent mind and faces its evidence, it seems almost incredible that he should not arrive at certain inevitable logical conclusions. And a man may do that and still not be a Christian. The historical evidence for the Person ofJesus Christ of Nazareth is beyond question. You cannot explain the persistence of the Christian Church apart from Him; the evidence is overwhelming. So a man may face that and say: `Yes, I accept that argument’. He may subscribe to the truth and say: `Jesus of Nazareth was none other than the Son of God’. He may say that and still be unregenerate, and not a Christian. He may say `Lord, Lord’, and yet not enter the kingdom of heaven. Our forefathers, in days when they realized these dangers, used to emphasize this tremendously. Read the works of the Puritans and you will find that they devoted not only chapters but volumes to the question of `false peace’. Indeed, this danger has been recognized throughout the centuries. There is the danger of trusting your faith instead of Christ, of trusting your belief without really becoming regenerate. It is a terrible possibility. There are people who have been brought up in a Christian home and atmosphere, who have always heard these things, and in a sense have always accepted them, and have always believed and said the right thing; but still they may not be Christians.
D. Martyn Lloyd-Jones, Studies in the Sermon on the Mount (Kindle Edition)