Definizione e Significato di "diamond cuts diamond"

What is the origin of the proverb "diamond cuts diamond" and when to use it?

The origin of the proverb "diamond cuts diamond" is not strictly tied to a specific source but rather stems from the natural qualities of diamonds, which are famously known for their hardness. This reflects the idea that only a person who is equally capable or powerful can truly challenge or compete effectively with someone. The proverb highlights the notion that encountering a worthy opponent can lead to personal growth, greater achievement, or a more challenging competition.