10 Do not say, “Why were the old days better than these?” For it is not wise to ask such questions.

Read Ecclesiastes 7:10 Using Other Translations

Say not thou, What is the cause that the former days were better than these? for thou dost not enquire wisely concerning this.
Say not, "Why were the former days better than these?" For it is not from wisdom that you ask this.
Don’t long for “the good old days.” This is not wise.