What doesn't kill you makes you stronger
kinatʃokuua hakikufaɲi kuwa hodari
In Swahili Kinachokuua hakikufanyi kuwa hodari.
This phrase is known in Swahili-speaking cultures, often used as a motivational quote.
Example
"Baada ya shida, alisema: 'Kinachokuua hakikufanyi kuwa hodari'."