Full Idea
The important beliefs, even if they are not the only ones, are those which, if rendered into explicit words, take the form of a proposition.
Gist of Idea
Our important beliefs all, if put into words, take the form of propositions
Source
Bertrand Russell (On Propositions: What they are, and Meaning [1919], §III)
Book Reference
Russell,Bertrand: 'Logic and Knowledge', ed/tr. Marsh,Robert Charles [Routledge 1956], p.307
A Reaction
This assertion is close to the heart of the twentieth century linking of ontology and epistemology to language. It is open to challenges. Why is non-propositional belief unimportant? Do dogs have important beliefs? Can propositions exist non-verbally?