'Activity' in the Bible

"The LORD made me as he began his planning, before his ancient activity commenced.

I observed every activity done on earth. My conclusion: all of it is pointless like chasing after the wind.

I saw all of it as the activity of God. Frankly, a human being cannot understand what happens on earth, because however hard a man works to discover it, he will not find out. Despite what he thinks he knows, he will not be able to figure it out.

Whatever the activity in which you engage, do it with all your ability, because there is no work, no planning, no learning, and no wisdom in the next world where you're going.