12. For as many as have sinned--not "as many as have sinned at all," but, "as many as are found in sin" at the judgment of the great day (as the whole context shows).
      without law--that is, without the advantage of a positive Revelation.
      shall also perish without law--exempt from the charge of rejecting or disregarding it.
      and as many as have sinned in the law--within the pale of a positive, written Revelation.
      shall be judged by the law--tried and condemned by the higher standard of that written Revelation.

JFB.