Prabhupāda: Aviśuddha-buddhayaḥ (SB 10.2.32). They do not know. They are after brahmaṇanda, transcendental pleasure, but they do not know what is actually transcendental pleasure, impersonalists. Therefore their intelligence is not clean. They go to the spiritual kingdom, transcendental platform, but they do not that know, how real transcendental pleasure can be achieved. Therefore their knowledge is not perfect.
Revatīnandana: When they want to come back, is it very easy for them to come back or have they got to...?
Prabhupāda: No, they automatically come back because he is hankering after varieties. So that variety is not there, so he is attracted again in the material world. Just like so many sannyāsīs. Take Vivekananda. He wanted to lecture on Vedānta, which is liberation. He came again back to the hospitalizing and philanthropic work because he could not find the variety of pleasure in Vedānta. Of course, he was not very much advanced. There are many. There is a... Sannyāsī is here. he's a Kārpātrī(?). He is very learned and other... He was formerly speaking on Vedānta and other... Now he is in politics and cow protection. You see? There are many.