It goes to show
Meanings of "It goes to show"
If you say "it goes to show", you mean that what you have said or experienced demonstrates that it is the case.
Da sieht man’s mal wieder!
das zeigt / das beweist
"It goes to show" in lyrics
If a communist decides to drink beer, it is considered flattery with no ill intent for the little guy.
But if a communist drinks coffee, he will only seem rational at best to avoid giving himself away.
Should he drink coca-cola, then it goes to show that he has betrayed his own ideals.
If a communist drinks vodka, then it is a testament to the extent his confidence for "Mother Russia" is already at.