Jeffro, it's actually simpler than that. Some will give their "consideration to it with understanding." Others will ignore prophecy to their detriment. I go on God's track record on prophecy and so far I am impressed. For you, wait and see.
The anger of Jehovah will not turn back until he will have carried out and until he will have made the ideas of his heart come true. In the final part of the days YOU people will give YOUR consideration to it with understanding [you will understand it clearly, ESV] (Jer. 23:20)
The burning anger of Jehovah will not turn back until he will have executed and until he will have carried out the ideas of his heart. In the final part of the days YOU people will give YOUR consideration to it. (Jer. 30:24)
Many will cleanse themselves and whiten themselves and will be refined. And the wicked ones will certainly act wickedly, and no wicked ones at all will understand; but the ones having insight will understand. (Dan. 12:10)