Nietzsche's Idea of Eternal Recurrence : a Way of Understanding Our Lives?
I am inclined to think that matter and everything is recycled in some ways. In some ways, the idea of reincarnation is like recycling of 'souls'. The concept of the soul is open to dispute though.
As far as cycles, it seems that there are certain cycles, and the most obvious ones are the days and the whole following on of the seasons on a yearly basis. With the wider cycles, it is a matter of how we frame them. Certainly, the Indian philosophers saw us within an eternity of cosmic cycles. I believe that the idea of eternal recurrence was prominent in Zoroathranism. One other depiction of cycles was the astrological system and, in that picture, we are at the cusp between Pisces and Aquarius.
Part of the problem with seeing whether the fate of the earth, as to whether it is linear or cyclical is because we don't know the eventual outcome. Also, we don't know if universes and worlds populated by lifeforms have existed before us. So, we have a very limited frame of reference. Of course, this is taking the idea of eternal recurrence as a literal one. However, even though Nietzsche's may have eventually concluded that it was symbolic, the whole idea is worth considering on a cosmic level and I believe that the writer, Ouspensky, saw it in this grander scale. I am inclined to think that there are cycles but that we cannot see this fully because they are gradual and, as a result appear deceptively as being part of a linear process.