the end justifies the means
Definition:  a desired result is so important that any method, even a morally bad one, may be used to achieve
Usage:  he is campaigning with illegal funds on the theory that if he wins the election the end will justify the means

SEPEDI
Translation:  mafelelo a lokafatša mokgwa
Proverb: go roga kgoši go tsenya monna kgorong

XITSONGA
Translation:  makumu ya seketela maendlelo
Proverb: n’wana u tseme mubya

TSHIVENḒA
Translation:  hu amba magumo hu si kuswikele
Proverb: a si mulandu arali u songo farwa