If you don't make mistakes, you don't make anything.
Prov. If you try to do something, you will likely make mistakes.; The only way to make no mistakes is to avoid trying to do anything. (Can be used to console someone who has made a mistake.) Alan: I'm sorry there's no dessert. I tried to make a cake, but I messed it up. Jane: That's OK, dear; if you don't make mistakes, you don't make anything. It's a shame that you ruined the sweater you were making, but if you don't make mistakes, you don't make anything.