One verse

Srimad Bhagavatam 4.29.66

4.29.66

मन एव मनुष्यस्य पूर्वरूपाणि शंसति । भविष्यतश्च भद्रं ते तथैव न भविष्यत: ॥ ६६ ॥

mana eva manusyasya purva-rupani samsati bhavisyatas ca bhadram te tathaiva na bhavisyatah

manah
the mind
eva
certainly
manusyasya
of a man
purva
past
rupani
forms
samsati
indicates
bhavisyatah
of one who will take birth
ca
also
bhadram
good fortune
te
unto you
tatha
thus
eva
certainly
na
not
bhavisyatah
of one who will take birth.

O King, all good fortune unto you! The mind is the cause of the living entity’s attaining a certain type of body in accordance with his association with material nature. According to one’s mental composition, one can understand what the living entity was in his past life as well as what kind of body he will have in the future. Thus the mind indicates the past and future bodies.