For everything there is an appointed time, and an appropriate time for every activity on earth:

I decided to carefully and thoroughly examine all that has been accomplished on earth. I concluded: God has given people a burdensome task that keeps them occupied.

I thought deeply about the effects of indulging myself with wine (all the while my mind was guiding me with wisdom) and the effects of behaving foolishly, so that I might discover what is profitable for people to do on earth during the few days of their lives.

Do not curse a king even in your thoughts, and do not curse the rich while in your bedroom; for a bird might report what you are thinking, or some winged creature might repeat your words.