Bhagavad Gita Chapter 8 Verse 6
भगवद् गीता अध्याय 8 श्लोक 6

यं यं वापि स्मरन्भावं त्यजत्यन्ते कलेवरम्।
तं तमेवैति कौन्तेय सदा तद्भावभावितः।।8.6।।



हिंदी अनुवाद - स्वामी तेजोमयानंद
।।8.6।। हे कौन्तेय  (यह जीव) अन्तकाल में जिस किसी भी भाव को स्मरण करता हुआ शरीर को त्यागता है वह सदैव उस भाव के चिन्तन के फलस्वरूप उसी भाव को ही प्राप्त होता है।।


Kumara Vaishnava Sampradaya - Commentary
Whatever image prominently floats in ones thoughts at the moment  of  death
and one leaves ones physical body with that final thought one  will  become
in their very next life. This is  what  Lord  Krishna  is  stating  in  this
verse. Their final thought  will  become  form.  Ones  final  thought  will
naturally be what was constantly  reflected  upon  and  mediated  on  during
their span of life based upon ones association and daily habits.