secret of nature; profound secret
Refers to a deep, often cosmic or natural secret; used in literary or philosophical contexts.
The secrets of nature should not be easily divulged.
disposition; character; nature
Rare, classical usage referring to a person's innate character or temperament.
emperor's health; emperor's well-being
Honorific term used historically for the health of the emperor; now mostly encountered in historical or formal contexts.
An envoy was dispatched to inquire after the emperor's health.
His disposition was gentle, and he was liked by everyone.