expression
an uncut gem does not sparkle; success requires effort, not just talent
Proverb meaning that innate ability is not enough; one must polish one's skills through hard work. The literal image is of an unpolished gem that cannot shine.
「玉磨かざれば光なし」というように、才能があっても努力しなければ成功できない。
As the saying goes, 'An uncut gem does not sparkle'; even if you have talent, you cannot succeed without effort.
A Japanese proverb derived from classical Chinese thought, often associated with Confucian teachings on self-cultivation. The exact origin is uncertain, but it reflects the idea that raw talent must be refined through study and practice.