Full Idea
If there are no propositions, then there are no contents, and thus there are no beliefs and desires.
Gist of Idea
Without propositions there can be no beliefs or desires
Source
Thomas Hofweber (Ontology and the Ambitions of Metaphysics [2016], 01.4.3)
Book Reference
Hofweber,Thomas: 'Ontology and the Ambitions of Metaphysics' [OUP 2018], p.15
A Reaction
A simple but powerful point. Those who claim that there are only sentences (and no propositions) can hardly claim that you must formulate a sentence every time you have a specific belief or desire.