"The best guarantee of full employment and price stability" is... full employment and price stability

Comparing unemployment and inflation rates to Federal Reserve targets, Ed Dolan writes:

First, as market monetarists point out, the best guarantee of full employment and price stability over the long run is steady growth of nominal GDP in the range of 4 to 5 percent per year.

Comparing Irving Fisher's Debt-Deflation Theory of Great Depressions to Frank Herbert's Dune story, Geerussell writes:

Market monetarists would be the Guild Navigators, huffing spice and folding space to move from point A to point B avoiding everything in between.

That sums it up perfectly.