Chakra, maybe you inspired this. thanks.
Lately I've been really wondering more about the 4 yogas concept, as summarised here: http://www.swamij.com/four-paths-of-yoga.htm
Sivananda, although by his name sounds like he was a Saivite, actually wasn't. He was a Smarta, Advaita Vedantin. Many people mistakenly think He was a great Saivite. Great Guru, yes, and his work is remarkable, but not a Saivite in the traditional sense.
That would explain a lot; I always had trouble connecting with a lot of things he had to say and it would explain some of the conversations I've had with at least one student of his teachings. Sivananda also had a certain appreciation/inclusion of Jesus Christ at times which I found rather odd. I'm not too keen on what Smarta thinks about the Gunas but I remember that being a big point I disagreed on and I saw his view as differing form what I understand of Samkya which is much closer to what I believe on the topic of the gunas.I really identify with Rajo Guna and see it as both potentially good or bad, which is congruent with Samkya but not with what Sivananda believed. I would probably agree that Tamas is always bad but I really don't know that for certain, but it would seem so from what I know and have experienced. Anyways the Gunas are pretty important to what I personally believe.