17:11 Is in the blood - Depends upon the blood, is preserved and nourished by it. The blood maketh atonement - Typically, and in respect of the blood of Christ which it represented, by which the atonement is really made. So the reason is double; because this was eating up the ransom of their own lives, which in construction was the destroying of themselves. because it was ingratitude and irreverence towards that sacred blood of Christ which they ought to have in continual veneration.
17:10-16 Here is a confirmation of the law against eating blood. They must eat no blood. But this law was ceremonial, and is now no longer in force; the coming of the substance does away the shadow. The blood of beasts is no longer the ransom, but Christ's blood only; therefore there is not now the reason for abstaining there then was. The blood is now allowed for the nourishment of our bodies; it is no longer appointed to make an atonement for the soul. Now the blood of Christ makes atonement really and effectually; to that, therefore, we must have regard, and not consider it as a common thing, or treat it with indifference.