Let it be unto him as the garment which covereth him - He has chosen to put it on, to wear it, to appear in it; so let him constantly feel its consequences. As he is always obliged to wear clothing, so let this be as constantly with him and upon him as his mantle and his sash.
And for a girdle wherewith he is girded continually - The belt or girdle which he constantly wears. See the notes at Matthew 5:38.