expression
heaven and earth are eternal
A yojijukugo expressing the idea that the natural world endures forever, often used in philosophical or poetic contexts.
天地長久の理を思うとき、人の一生の短さが身にしみる。
When I contemplate the principle that heaven and earth are eternal, the brevity of human life strikes me deeply.
A yojijukugo composed of 天地 (heaven and earth) and 長久 (eternal, long-lasting). The exact origin is uncertain, but it reflects a classical Chinese-derived concept of the permanence of the cosmos.