'Delusion' in the Bible

So {I dedicated myself} to learn about wisdom and [to] learn about delusion and folly. However, I discovered that this also [is] chasing wind.

Next, I considered wisdom, as well as delusion and folly. What can anyone [do] who will come after the king that has not already been done?

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

This [is] the {injustice} that is done under the sun: the same fate [comes] to everyone. Also the hearts of {humans} are full [of] evil; delusion [is] in their hearts during their lives, and then they die.

He begins by saying what is foolish and ends by uttering what is wicked delusion.

And because of this, God sends them {a powerful delusion} so that they will believe the lie,