When this wrath bursts over them, the rulers and leaders of the people will be perplexed and helpless. The heart, i.e., the mind, is lot. For this use of לֵב, cf. Job 12:3; Job 34:10; Pro 7:7, etc. נָשַׁמּוּ, be paralyzed by terror, like the Kal in Jer 2:12. The prophets are mentioned last, because Jer 4:10 cites a word of prophecy whereby they seduced the people into a false security.