one cannot make an omelette without breaking eggs
Definition:  when you want to achieve a specific task, you must be willing to do some unpleasant things
Usage:  your children do not show respect for you; you might not want to appear as a bad parent and yell at them, but you cannot make an omelette without breaking a few eggs

SEPEDI
Translation:  motho a ka se dire omolete ntle le go thuba mae
Proverb: ngaka go alafa ya leme-le-thata

XITSONGA
Translation:  munhu a nge endli mandza yo katingiwa handle ko faya mandza
Proverb: xiganga xi hlola xirhelelo

TSHIVENḒA
Translation:  muthu a nga si kone hadzinga makumba a songo kwashiwa
Proverb: a hu na nḓila i si na mipfa