In Isaiah 1:18, this signifies to think interiorly in either truth or falsity. (Arcana Coelestia 118)

In Daniel 4:34, this signifies a state of insincere acknowledgment and worship of the Lord, before people under obedience to them. (The Inner Meaning of the Prophets and Psalms 175)

In Matthew 16:8, this signifies to have little faith and so to question. (Apocalypse Explained 569)

175. Internal Meaning of Daniel, Chapter 4

1-3 [See above, end of chapter 3.] (11)

It is foretold what Babylon will be, and whither their mind was moved. (2, 2)

4-7 This was not known to those who were Babylon. (2)

8-9 It was known to those who were of the Lord's church. (2)

10-12 They purposed to have dominion over heaven and the church when that religion should extend over much territory. (2)

13-14 Then they would no longer have any goods and truths of heaven and the church. (2)

15-17 Nevertheless the Word would remain with them, although perverted. (2)

18-19 Then those who were of the Lord's church perceived what those of the Babylonish religion were interiorly, and how far they wished to extend their dominion. (11)

20-33 They were so stupid in respect to the truths and goods of the church, as to be no longer men, and this fact was confirmed from heaven, where they were seen to be such. (2)

34-37 They feared as yet to extend their dominion over heaven and the church, but acknowledged the Lord before those who were under obedience to them. (2)