Jeremiah 4:22

For my people is foolish: though God show them here that the cause of all these calamities is their folly, Jeremiah 2:17,19 Psa 38:3,5, yet he owns them for his people, Jeremiah 2:11,31,32. They have not known me; which is indeed the only true wisdom; they have not studied my disposition or mildness toward them; they are so sottish, that they have neither regarded my counsels nor threats, but utterly stupid; they know not what is for their own good, have no understanding. They have no knowledge, i.e. their knowledge is as bad or worse than none, it is very ill employed in doing evil, only witty here, crafty and subtle. See 2 Samuel 13:3. But how to do any good they know not, Jeremiah 9:3 Luke 16:8: this the apostle dehorts from, 1 Corinthians 14:20.