So I said to myself, “What happens to the fool will also happen to me. Why then have I been overly wise?” And I said to myself that this is also futile.

Do not let your mouth bring guilt on you, and do not say in the presence of the messenger that it was a mistake. Why should God be angry with your words and destroy the work of your hands?

Don’t say, “Why were the former days better than these?”
since it is not wise of you to ask this.

Don’t be excessively righteous, and don’t be overly wise. Why should you destroy yourself?

Don’t be excessively wicked, and don’t be foolish. Why should you die before your time?