The Will to Power · Friedrich Wilhelm Nietzsche
574.
The nonsense of all metaphysics shown to reside in the derivation of the conditioned out of the unconditioned. It belongs to the nature of thinking that it adds the unconditioned to the conditioned, that it invents it--just as it thought of and invented the "ego" to cover the multifariousness of its processes i it measures the world according to a host of self-devised measurements--according to its fundamental fictions "the unconditioned," "end and means," "things," "substances," and according to logical laws, figures, and forms. There would be nothing which could be called knowledge, if thought did not first so _re-create_ the world into "things" which are in its own image. It is only _through_ thought that there is _untruth._ The _origin_ of thought, like that of _feelings,_ cannot be traced: but that is _no_ proof of its primordiality or absoluteness! It simply shows that we cannot get _behind it,_ because we have nothing else save thought and feeling. To know is to _point to past experience:_ in its nature it is a _regressus in infinitum._ That which halts (in the face of a so-called _causa prima_ or the unconditioned, etc.) is _laziness,_ weariness.
Text from Project Gutenberg, public domain in the United States.