Those who are not sober cannot understand how the spirit soul is changing from one body to another. Krsna therefore says that this change of body can be appreciated only by the dhiras. dhiras tatra na muhyati [Bg. 2.13]. While those who are not dhiras cannot understand how the soul is changing from one body to another.
Letter to Svarupa Damodara dasa, 23 June, 1975