VIDURA
The impersonalists, who take much trouble in penance and austerity for self-liberation, may approach the impersonal brahmajyoti, but ultimately, because of not being situated in devotional service, they glide down again to the material world to undergo another term of material existence. This is confirmed as follows:
ye 'nye 'ravindaksa vimukta-maninas
tvayy asta-bhavad avisuddha-buddhayah
aruhya krcchrena param padam tatah
patanty adho 'nadrta-yusmad-anghrayah
"Persons who are falsely under the impression of being liberated, without devotional service to the Lord, may reach the goal of the brahmajyoti, but because of their impure consciousness and for want of shelter in the Vaikunthalokas, such so-called liberated persons again fall down into material existence." (Bhag. 10.2.32)