1
general::
Accept the bad along with the good, as in You can't expect to close a lot of sales every week? you have to take the rough with the smooth. This adage was first recorded about 1400. Also see TAKE THE BITTER WITH THE SWEET.
American Heritage Idioms
2
general::
Phrase(s): Take the rough with the smooth.
Prov. Accept difficult as well as easy times. • Don’t give up on your business just because you lost money this month. You have to take the rough with the smooth.
McGrawhill's American Idioms And Phrasal Verbs