Who said only dead fish go with the flow?

The exact origin of the phrase "Only dead fish go with the flow" is unknown. It's a proverb that's been around for a long time, but there's no definitive source or author.

However, the phrase is often attributed to Albert Einstein, though there's no evidence to support this claim.

It's important to remember that even though the phrase is frequently associated with Einstein, there's no proof he ever said it.