it (only/just) goes to show (you)

it (only/just) goes to show (you)

Something proves, demonstrates, or indicates that something else is true. A: "I can't believe that start-up has been so successful." B: "It just goes to show that you can't underestimate the power of good marketing." My grandfather's pocket watch still runs perfectly after all these years. It goes to show you the level of craftsmanship put into it.
See also: goes, show
Farlex Dictionary of Idioms.

it (just/only) goes to ˈshow (that...)

used to say that something is an example of a general truth or principle: He had all his money stolen? It just goes to show you should always lock your desk.
See also: goes, show
Farlex Partner Idioms Dictionary
See also:
  • a whack at (something)
  • a/the feel of (something)
  • (I) wouldn't (do something) if I were you
  • a straw will show which way the wind blows
  • a crack at (someone or something)
  • all right
  • (you) wanna make something of it?
  • all for the best
  • a thing of the past
  • a slew of (something)