nosiness

venetian blinds

is ill-advised --- curiosity killed the cat.

is bound to reveal things you'd better not know --- he who peeps through a hole may see what will vex him

He who peeps through a hole may see what will vex him

is not wise --- it's better to put your finger on a problem before sticking your nose into it.

It's better to put your finger on a problem before sticking your nose into it.

is unwise --- If everybody minded their own business, the world would go round a deal faster than it does.

If everybody minded their own business, said the Duchess in a hoarse growl, "the world would go round a deal faster than it does."