expression
time and tide wait for no man
Classical proverb meaning that one's prime years do not come twice; often used to encourage seizing the moment. The phrasing is literary and somewhat archaic.
「盛年重ねて来たらず」という言葉を胸に、今を精一杯生きよう。
With the saying 'time and tide wait for no man' in mind, let's live this moment to the fullest.
Both are proverbs about the swift passage of time, but 光陰矢の如し emphasizes speed, while 盛年重ねて来たらず stresses the irreversibility of youth.
A classical Chinese-derived proverb. The exact origin is uncertain, but it reflects a common East Asian motif about the fleeting nature of youth.