Jonah Goldberg is rambling against the movement to view the U.S. Constitution as a 'living' document, meaning one with shifting interpretations in order to keep up with the needs of changing times. It's a lot like the Bible that way; we need to interpret the Constitution and the Bible for modern generations.
Hey, it would be nice if it weren't necessary; if there some way to amend the Constitution so that we could change it. But alas, the Founding Fathers unwisely chose to make the Constitution carved in stone, unchangeable forever. So it is necessary to grant judges the authority to reinterpret it for our benefit so that we can continue letting this document guide us.