“Time makes more converts than reason.”
Ideas that initially provoke resistance can become easier to accept as experience changes what people consider normal or possible.
Source details
Common Sense (1776), Introduction. The represented wording is verified in Project Gutenberg #147 and the validated scan-backed Wikisource 1776 sixth-edition transcription; Paine follows his warning that custom can make an error look right by observing that time often changes opinion where argument initially does not.