In my contribution, I will reconstruct a Fregean motivation for a content/force distinction that has been neglected in the literature. Frege argues that in certain linguistic contexts subordinate clauses express thoughts (and refer to truth-values). In natural language these clauses, and not complete assertoric sentences, are the closest we get to expressions that express thoughts without force. I will explore Frege's reasoning and assess whether his conclusions are defensible. The chapter concludes by outlining a Fregean perspective on the problem of the unity of the proposition.