“The sun never shined on a cause of greater worth.”
The line emphasizes the scale and future consequences of the political choice Paine believed his contemporaries faced.
Source details
Common Sense (1776), “Thoughts on the present State of American Affairs.” The represented wording is verified in Project Gutenberg #147 and the validated 1776 Wikisource transcription; Paine enlarges the stakes from a city or province to a continent and to posterity.