This interview with Dr. Robert Gilbert is a lengthy discussion about multiple topics, but I found some real gems throughout. The segment on "Who Are Ahriman, Lucifer, And Christ? | The Middle Path Balance" that starts at 1:28 and "The Luciferic & Ahrimanic Impulse In Society" at 2:09:20 were particularly enlightening, as I had never heard these impulses and beings explained in this way. I also appreciated being reminded of Rudolf Steiner's Six Basic Exercises for Esoteric Development, as those back up the Divine principle of balance.
Well-worth a listen if you are at all interested in the history and principles of ancient esoteric traditions.
https://youtu.be/3JWNr0SvIVM