The frequency with which they were offered

[Every morning and every evening were they to be offered throughout the year; and from this circumstance they were called “a continual burnt-offering.” Now there were two things in particular, which this circumstance was calculated to impress on the people's minds; the one was their continual need of an atoning sacrifice; the other was, the continued efficacy of that which should in due time be offered. Not a day past but they were repeatedly reminded, even the whole congregation, that they were sinners before God, and must seek salvation through Him whom this offering typified: (O that we also might bear in mind that salutary lesson!) they were reminded too that there was in this sacrifice a sufficiency for the sins of the whole world. Not the greatest sinner in all Israel was excepted, if he did but really with penitential sorrow seek for pardon in this way: nor, as long as the world shall stand, shall any one plead the merits of the Redeemer's sacrifice in vain. The shadows were repeated, because they were shadows: but Christ who is the substance, has made a complete atonement for the sins of the whole world, and “by one offering of himself hath perfected for ever them that are sanctifiedᵖ.”]

ᵖ Heb. x. 14.