To be certain of that, one must also be certain what objective truth is.

But you are not certain, as you very well know, and so logically you must admit the possibility that metaphysics can hold a spark of objective truth.

I am of an entirely different opinion on this point.

I believe that the science of the actual content of things, the foundation of all appearances, the laws of the universe, in short, everything which you call objective truth, is the property peculiar to the atoms, of which the world formerly existed.

Absolute science, I say, is inherent matter, like motion and gravitation.