Job 33:21

His flesh is consumed away - As in atrophy, marasmus, and consumptive complaints in general.

His flesh is consumed away, that it cannot be seen - He wastes away. His flesh, once vigorous, beautiful, and fair, now disappears. This is not a mere description of the nature of his sickness, but it is a description of the disciplinary arrangements of God. It is an important part of his affliction, as a part of the discipline, that his flesh vanishes, and that his appearance is so changed that he becomes repulsive to the view.

And his bones that were not seen, stick out - His bones were before invisible. They were carefully concealed by the rounded muscle, and by the fat which filled up the interstices, so that they were not offensive to the view. But now the protuberances of his bones can be seen, for God has reduced him to the condition of a skeleton. This is one of the common effects of disease, and this shows the strength of the discipline which God contemplates. The parts of the human frame which in health are carefully hid from the view, as being unsightly, become now prominent, and can be hidden no longer. One design is to humble us; to take away the pride which delighted in the round and polished limb, the rose on the cheek, the ruby lip, and the smooth forehead; and to show us what we shall soon be in the grave.