LOL! I considered responding to jackd, but I decided against it. If eternal truths change, I guess they weren't really eternal or true.
One of the more wobbly ontological propositions of progressive liberalism regularly lampooned by conservatives. For instance, right from Russell Kirk's famous
"Six Canons of Conservative Thought":
"Recognition that change may not be salutary reform: hasty innovation may be a devouring conflagration, rather than a torch of progress."
Or to quote another famous conservative, Mr. Hand from Fast Times at Ridgemont High, "Learn it, live it, love it."
http://www.townhall.com/hall_of_fame/kirk/kirkhome.html