Matthew 6:12,14-15 Forgive us our debts as we forgive our debtors … For if you forgive men their trespasses, your heavenly Father will forgive you too; but, if you do not forgive men their trespasses, neither will your Father forgive your trespasses.

Before a man can honestly pray this petition of the Lord’s Prayer he must realize that he needs to pray it. That is to say, before a man can pray this petition he must have a sense of sin. Sin is not nowadays a popular word. Men and women rather resent being called, or treated as, hell-deserving sinners.

The trouble is that most people have a wrong conception of sin. They would readily agree that the burglar, the drunkard, the murderer, the adulterer, the foul-mouthed person is a sinner. But they are guilty of none of these sins; they live decent, ordinary, respectable lives, and have never even been in danger of appearing in court, or going to prison, or getting some notoriety in the newspapers. They therefore feel that sin has nothing to do with them.

The New Testament uses five different words for sin.

(i) The commonest word is hamartia ( Greek #266 ). This was originally a shooting word and means a missing of the target. To fail to hit the target was hamartia. Therefore sin is the failure to be what we might have been and could have been.

Charles Lamb has a picture of a man named Samuel le Grice. Le Grice was a brilliant youth who never fulfilled his promise. Lamb says that there were three stages in his career. There was a time when people said, “He will do something.” There was a time when people said, “He could do something if he would.” There was a time when people said, “He might have done something, if he had liked.” Edwin Muir writes in his Autobiography: “After a certain age all of us, good and bad, are grief stricken because of powers within us which have never been realized: because, in other words, we are not what we should be.”

That precisely is hamartia ( Greek #266 ); and that is precisely the situation in which we are all involved. Are we as good husbands or wives as we could be? Are we as good sons or daughters as we could be? Are we as good workmen or employers as we could be? Is there anyone who will dare to claim that he is all he might have been, and has done all he could have done? When we realise that sin means the failure to hit the target, the failure to be all that we might have been and could have been, then it is clear that every one of us is a sinner.

(ii) The second word for sin is parabasis ( Greek #3847 ), which literally means a stepping across. Sin is the stepping across the line which is drawn between right and wrong.

Do we always stay on the right side of the line which divides honesty and dishonesty? Is there never any such thing as a petty dishonesty in our lives?

Do we always stay on the right side of the line which divides truth and falsehood? Do we never, by word or by silence, twist or evade or distort the truth?

Do we always stay on the right side of the line which divides kindness and courtesy from selfishness and harshness? Is there never an unkind action or a discourteous word in our lives?

When we think of it in this way, there can be none who can claim always to have remained on the right side of the dividing line.

(iii) The third word for sin is paraptoma ( Greek #3900 ), which means a slipping across. It is the kind of slip which a man might make on a slippery or an icy road. It is not so deliberate as parabasis ( Greek #3847 ). Again and again we speak of words slipping out; again and again we are swept away by some impulse or passion, which has momentarily gained control of us, and which has made us lose our self-control. The best of us can slip into sin when for the moment we are off our guard.

(iv) The fourth word for sin is anomia ( Greek #458 ), which means lawlessness. Anomia is the sin of the man who knows the right, and who yet does the wrong; the sin of the man who knows the law, and who yet breaks the law. The first of all the human instincts is the instinct to do what we like; and therefore there come into any man’s life times when he wishes to kick over the traces, and to defy the law, and to do or to take the forbidden thing. In Mandalay, Kipling makes the old soldier say:

Ship me somewheres east of Suez, where the best is like the worst,

Where there aren’t no Ten Commandments, an’ a man can raise a thirst’

Even if there are some who can say that they have never broken any of the Ten Commandments, there are none who can say that they have never wished to break any of them.

(v) The fifth word for sin is the word opheilema ( Greek #3783 ) which is the word used in the body of the Lord’s Prayer; and opheilema means a debt. It means a failure to pay that which is due, a failure in duty. There can be no man who will ever dare to claim that he has perfectly fulfilled his duty to man and to God: Such perfection does not exist among men.

So, then, when we come to see what sin really is, we come to see that it is a universal disease in which every man is involved. Outward respectability in the sight of man, and inward sinfulness in the sight of God may well go hand in hand. This, in fact, is a petition of the Lord’s Prayer which every man needs to pray.

William Barclay’s Daily Study Bible