go to show
go to show or go to prove {v. phr.}, {informal}
To seem to prove; act or serve to show (a fact); demonstrate. — Often used after "it".
Our team beat a bigger team, and it just goes to show you can win if you play hard enough.
The hard winter at Valley Forge goes to show that our soldiers suffered a great deal to win the Revolution.
Categories:
Source: A Dictionary of American Idioms