プログレッシブ和英中辞典(第4版)の解説
かくげん【格言】
〔ことわざ〕a proverb；〔言い習わし〕a saying；〔処世訓〕a maxim
格言いわく「歳月人を待たず」
「According to a maxim, [As the proverb has it,/As the proverb says,/There is a saying that]“Time and tide wait for no man.”
格言の言う通り急がば回れだよ
Make haste slowly, as the saying goes.