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.
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.
From 陶淵明’s poem 『雑詩』, whose line 盛年不重来 means that the prime of life does not come a second time.