It looks like you sold the butter but lost the money. This one is when you’re, like, when you look sad…people can say that cuz they’re like…you’ve done something good and you’ve lost it. You have your butter and you sell it and then you lose the money you make. So you do something well but you don’t keep it.
This is a rather tricky saying to unpack. In essence, I believe it attempts to say that one cannot sustain the success one has achieved—it is an ephemeral success. This saying seems akin to the American saying, “you’ve dropped the ball”. This saying implies that you’ve done something great (or have been given the opportunity to do something great) but failed to sustain that greatness—you messed up.
I believe that my experience in diving perfectly embodies this saying. I am a springboard and platform diver, and in diving consistency is what makes you successful—consistency in practice and consistency in meets. When my coach gives me corrections he always stresses that we take a few moments to reflect on what we’ve just done after we successfully make the correction he asks of us. It doesn’t matter if I am able to make the correction once; what matters is that I am able to sustain the correction, hold on to the change, otherwise I’ve done something great and then lost it—just like this Swedish saying describes.