There can be no doubt that a very real conviction of sin lies at the foundation of much, if not all, of the system of sacrifices. And it is a question well worth considering whether a conviction so widespread is not valid, and whether we should not see in it the expression of a true human need which no mere culture, or the like, will supply.
At all events, altars stand as witnesses to the consciousness of sin. And the same thought may be applied to much of the popular religion of this day. It may be ineffectual and shallow but it bears witness to a consciousness of evil. So its existence may be used in order to urge profounder realisation of evil on men. You come to worship, you join in confessions, you say 'miserable sinners'—do you mean anything by it? If all that be true, should it not produce a deeper impression on you?
But another way of regarding the metaphor is this. The horns of the altar were to be touched with the blood of propitiation. But look! the blood flows down, and after it has trickled away, there, deep carven on the horns, still appears the sin, i.e. the sin is not expiated by the sinner's sacrifice. Jeremiah is then echoing Isaiah's word, 'Bring no more vain oblations.' The picture gives very strikingly the hopelessness, so far as men are concerned, of any attempt to blot out this record. It is like the rock-cut cartouches of Egypt on which time seems to have no effect. There they abide deep for ever. Nothing that we can do can efface them. 'What I have written, I have written.' Pen-knives and detergents that we can use are all in vain.
II. Sin's writing may be erased, and another put in its place.
The work of Christ, made ours by faith, blots it out.
(a) Its influence on conscience and the sense of guilt. The accusations of conscience are silenced. A red line is drawn across the indictment, or, as Colossians has it, it is 'nailed to the cross.' There is power in His death to set us free from the debt we owe.
(b) Its influence on memory. Christ does not bring oblivion, but yet takes away the remorse of remembrance. Faith in Christ makes memory no longer a record which we blush to turn over, or upon which we gloat with imaginative delight in guilty pleasures past, but a record of our shortcomings that humbles us with a penitence which is not pain, but serves as a beacon and warning for the time to come. He who has a clear beam of memory on his backward track, and a bright light of hope on his forward one, will steer right.
(c) Its influence on character.
We attain new hopes and tastes. 'We become epistles of Christ known and read of all men,' like palimpsests, Homer or Ovid written over with the New Testament gospels or epistles.
Christ's work is twofold, erasure and rewriting. For the one, 'I will blot out as a cloud their transgressions.' None but He can remove these. For the other, 'I will put My law into their minds and will write it on their hearts.' He can impress all holy desires on, and can put His great love and His mighty spirit into, our hearts.