Rollock and Charnock on Natural vs. Moral Ability

Robert Rollock was a fountainhead in late 1500’s Scotland for the theology that would follow for the next century.  Charnock was an influential English puritan.  Here are both of them on the natural vs. moral ability distinction: 

Robert Rollock on the the Unregenerate’s Remote Power to do Good

Stephen Charnock on the Unregenerate’s Natural Ability