It's an excellent concept. Buckley himself generated a lot of variations on it, and folks (including me) have included their own variations. This has resulted in a lot of would-be perfeshinil naysayers claiming he never said (this one or that one or the other one).
But, as I say, the concept itself is full of sooth and savvy and amenable to variations.
Sort of like sqrt(E/m) = c.
Still makes sense if you use E for energy, m for mass, and c for the speed of light.
Terry runs and hides at somewhat less than the speed of light.
Edited To Add:
viz:
sqrt(E/m) = c
(E/m) = c
2E = mc
2