Looking for a certain saying by Franz Rozenzweig

Hi everyone,

I'm writing an essay based on Franz Rozenzweig's "The Builders". I would like to end the essay with a saying that yes, it takes great effort to achieve what's been talked about in the essay, but it would pay off or something like that. I wonder if anybody knows a saying by Rozenzweig himself the resembeles something like that? the context doesn't really matter.

Thanks!