the grass is always greener on the other side

(literally) a scentless flower / (literary) Synonym of 雪 (yuki, “snow”) (precipitation)

(fiction) Hanahaki, an illness affecting those consumed by unrequited love that manifests as the coughing up of flowers, which clears up upon reciprocation. A fictional illness, it has found popularity among both Japanese and foreign online fanfic (especially) artists and authors for its poetic quality.

(figuratively) a narrow world view based on limited experience

an ordinary person cannot understand the ambitions of a great man

Good things don't last forever. Roses have thorns.

very beautiful, said of a woman