How ‘bout this Bavinck quote someone sent me (from The Certainty of Faith):

Far be it from us to immediately denounce the [Roman Catholics who try to live pure lives] with the Protestant judgment that since such piety issues from a false principle—righteousness by works—it is therefore worthless to God. For no matter how much truth that judgment may contain, before we utter it we must remind ourselves that the Catholic righteousness by good works is vastly preferable to a Protestant righteousness by good doctrine. At least righteousness by good works benefits one’s neighbor, whereas righteousness by good doctrine only produces lovelessness and pride.

HT: the Presbyteer