अथ चैनं नित्यजातं नित्यं वा मन्यसे मृतम् | तथापि त्वं महाबाहो नैवं शोचितुमर्हसि ||२-२६||
atha cainaṃ nityajātaṃ nityaṃ vā manyase mṛtam . tathāpi tvaṃ mahābāho naivaṃ śocitumarhasi ||2-26||
Chapter 2 · Verse 26
Sankhya Yoga
सांख्ययोग
In plain words
You are being told to let go of your grief, even if you believe life is just a constant cycle of physical birth and death. If you lack the deep jnana, or spiritual wisdom, to see the eternal soul, you must still accept nature's law. What is born must die, and what dies must return. Do not let sorrow overwhelm you.
Translation
2.26 Or if you hold this self as being constantly born and as constantly dying, even then, O mighty-armed one, it does not become you to feel grief.
Meaning
Lord Krishna here for the sake of argument takes up the popular supposition. Granting that the Self is again and again born whenever a body comes into being and again and again dies whenever the body dies. O mightyarmed (O Arjuna of great valour and strength) thou shouldst not grieve thus because birth is inevitable to want is dead and death is inevitable to what is born. This is the inexorable or unrelenting Law of Nature.
Word by word
अथ now च and एनम् this (Self) नित्यजातम् constantly born नित्यम् constantly वा or मन्यसे thinkest मृतम् dead तथापि even then त्वम् thou महाबाहो mightyarmed न not एवम् thus शोचितुम् to grieve अर्हसि (thou) oughtest.