There are compelling reasons to countenance singular propositions as the contents of some sentences of natural language and our attitudes. But singular propositions give rise to metaphysical difficulties, as propositions have traditionally been taken to be necessary, permanent existents, but ordinary objects are not. Solutions to these difficulties require stances on general issues in the metaphysics of modality and time. In this essay we have surveyed some of the reasons for accepting singular propositions, examined the metaphysical difficulties they create, and distinguished several strategies for solving those difficulties.