Bhagavad Gita Chapter 15.10
utkrāmantaḿ sthitaḿ vāpi
bhuñjānaḿ vā guṇānvitam
vimūḍhā nānupaśyanti
paśyanti jñāna-cakṣuṣaḥ
Translation
The foolish cannot understand how a living entity can quit his body, nor can they understand what sort of body he enjoys under the spell of the modes of nature. But one whose eyes are trained in knowledge can see all this.