花有重开日,人无再少年。
Flowers may bloom again, but youth never returns.
—— 陈著
Source: 续侄溥赏酴醾劝酒(Encouraging Wine Drinking)
Background
This is a folk saying often used to remind people to cherish their youth and seize the present moment.
Interpretation
Flowers will bloom again after withering, but human youth never returns once it's gone. This reminds us to cherish time and not waste our precious years.