Srimad Bhagavadgita Sadhaka Sanjivani -Swami Ramsukhdas
Appendix:- In this verse Arjuna is repeating the utterances of the Lord by the term 'adideva' which was expressed by the Lord by the expression 'ahamadirhi devanam maharsinam ca sarvaSah' (10/2). Though Prakrti is also beginningless - 'prakrtitu pumsam caiva viddhyanadi ubhavapi' (13/19), yet prakrti depends on God. The reason is that prakrti is the kaleidoscopic power of God but God is not anyone's power and He is the master of the power.
'purauah' -The Lord mentioned it by the term 'puranam' (8/9). No one is more ancient than God because He is beyond time.