You are not what you think you are!
न जायते म्रियते वा कदाचित्
नायं भूत्वा भविता वा न भूयः
अजो नित्यः शाश्वतो,यम् पुराणो
न हन्यते हन्यमाने शरीरे
na jāyate mriyate vā kadācit
nāyam bhūtvā bhavitā vā na bhūyaḥ
ajo nityaḥ śāśvato’yam purāņo
na hanyate hanyamāne śarîre [2.20]
You are never born. You shall never die. It has never happened that you were not here, or that you shall not be here, or that you shall be destroyed. You are unborn, eternal, permanent, and ancient. Even though you may live in a transcient and changing body, you can never ever be harmed in any way.
You are the Atman and you can never be destroyed. The six changes of the body don’t affect you in any way. Birth, being, growth, modification, decay and death are the rulers of the material level, the physical level. If you identify with this state, you shall be wrong because you are not at all that. Sri Krishna teaches you here the fundamental fact of your life. You are the Eternal Atman. You have no modifications.
Why do you worry when some superficial covering, which is not you at all, undergoes change? Be bold and strong. Know the truth and be free. This is Sri Krishna’s advice to the world.