Full Idea
The hopelessly inadequate formalist theory is, to some extent, the result of considering only the propositions of mathematics and neglecting the analysis of its concepts.
Gist of Idea
Formalism is hopeless, because it focuses on propositions and ignores concepts
Source
Frank P. Ramsey (The Foundations of Mathematics [1925], §1)
Book Reference
Ramsey,Frank: 'Philosophical Papers', ed/tr. Mellor,D.H. [CUP 1990], p.165
A Reaction
You'll have to read Ramsey to see how this thought pans out, but it at least gives a pointer to how to go about addressing the question.