I applied my mind to seek and to search by wisdom all that is done under the heavens. It [is] a grievous task God has given to {humans}.

a time to seek and a time to lose; a time to keep and a time to throw away;

I set my mind to try to seek wisdom and the plan, and to know that wickedness [is] foolishness and that folly [is] delusion.

Do not curse the king even in your thoughts, and do not curse the rich even in your own bedroom, for a bird of the sky may carry your voice; a winged messenger may repeat your words.