Srimad Bhagavad Gita -Ramanujacharya 38

Srimad Bhagavad Gita -Ramanujacharya

Chapter-2 Sankhya Yogaḥ

avyaktādīni bhūtāni vyakta-madhyāni bhārata | avyakta nidhanānyeva tatra kā parivedana || 28 || 28. O Arjuna! All beings [in the universe] have a beginning that is unknown, a known middle and an unknown end. Why should there be anguish in relation to any of them? Commentary Humans and other sentient beings exist as substances of which the previous states are unknown, their middle states in their present forms are known, and their future states are unknown. As they all thus follow a natural precession, there is no cause for grief.