Full Idea
One can confidently challenge all pretended natural theologians to cite one single definitive attribute of their object, of which one could not irrefutably show that, when everything anthropomorphic is removed, only the word remains.
Clarification
'Anthropomorphic' means human-like
Gist of Idea
In all naturalistic concepts of God, if you remove the human qualities there is nothing left
Source
Immanuel Kant (Critique of Practical Reason [1788], I.II.II.VI)
Book Reference
Kant,Immanuel: 'Critique of Practical Reason (Third edition)', ed/tr. Beck,Lewis White [Library of Liberal Arts 1993], p.145
A Reaction
This idea derives from Hume's very empiricist view of our understanding of God (Idea 2185), but Kant is (remarkably) more hostile than Hume, because he actually implies that most people's concept of God is totally vacuous.
Related Idea
Idea 2185 The idea of an infinite, intelligent, wise and good God arises from augmenting the best qualities of our own minds [Hume]