For the law having a shadow - That is, the whole of the Mosaic economy was a shadow; for so the word “Law” is often used. The word “shadow” here refers to a rough outline of anything, a mere sketch, such as a carpenter draws with a piece of chalk, or such as an artist delineates when he is about to make a picture. He sketches an outline of the object which he designs to draw, which has “some” resemblance to it, but is not the “very image;” for it is not yet complete. The words rendered “the very image” refer to a painting or statue which is finished, where every part is an exact copy of the original. The “good things to come” here refer to the future blessings which would be conferred on man by the gospel. The idea is, that under the ancient sacrifices there was an imperfect representation; a dim outline of the blessings which the gospel would impart to people. They were a typical representation; they were not such that it could be pretended that they would answer the purpose of the things themselves which they were to represent, and would make those who offered them perfect. Such a rude outline; such a mere sketch, or imperfect delineation, could no more answer the purpose of saving the soul than the rough sketch which an architect makes would answer the purpose of a house, or than the first outline which a painter draws would answer the purpose of a perfect and finished portrait. All that could be done by either would be to convey some distant and obscure idea of what the house or the picture might be, and this was all that was done by the Law of Moses.
Can never with those sacrifices which they offered year by year continually - The sacrifices here particularly referred to were those which were offered on the great day of atonement. These were regarded as the most sacred and efficacious of all, and yet the apostle says that the very fact that they were offered every year showed that there must be some deficiency about them, or they would have ceased to be offered.
Make the comers thereunto perfect - They could not free them from the stains of guilt; they could not give ease to a troubled conscience; there was in them no efficacy by which sin could be put away; compare the notes on Hebrews 7:11; Hebrews 9:9.