calamity is mans true touchstone
Definition:  we gain wisdom faster in difficult times than in prosperous times
Usage:  after losing money in my investments, I know which investments to avoid; it is rightly said calamity is man’s true touchstone

SEPEDI
Translation:  kotsi ke teko ya makgonthe ya monna
Proverb: mohlako o ruta bohlale

XITSONGA
Translation:  nghozi hi yona yi hi kombaka munhu wa ntiyiso
Proverb: vusiwana bya tlharihisa

TSHIVENḒA
Translation:  musi muvhi ndi wone muelo vhukuma wa munna
Proverb: nungo dzi vhonala musi muvhi