Then he went down, and dipped himself seven times in the Jordan, according to the saying of the man of God: and his flesh was restored again like unto the flesh of a little child, and he was clean.
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George Leo Haydock
Clean. If bathing seven times in the Jordan had been an infallible remedy, there would soon have been no lepers in the land; and our Saviour plainly intimates that the cure was miraculous, Luke iv. 27. The leprosy of Naaman, though inveterate, was cured in an instant. To bathe in a rapid stream, is allowed to be very salutary for removing the diseases of the skin. (Calmet) (Vales. 38.)
The fathers discover in this miracle, a figure of the Gentiles called to the faith by the Synagogue, which is in servitude, Galatians iv. 25. Baptism cleanses us from all the seven capital sins, (Tertullian, contra Marc. 4.) so that no vestiges remain. (St. Ambrose) (Calmet)