A diamond is a chunk of coal that made good under pressure.
More Traditional Proverbs:
Love me when I least deserve it, because that's when I really need it.Traditional
If you have to kill a snake, kill it once and for all
Traditional
He that always thinks it is too soon is sure to come too late
Traditional
Social good is what brings peace to family and society.
Traditional
A snail's pace.
Traditional
Better to dig one deep well than 10 shallow ones.
Traditional