The Stoic eye can behold a wide-ranging beauty because it is unclouded by judgments that can muddy the view. The power of a lion stirs up admiration, even awe, but not fear. The process of decay, divorced from disgust, is understood as natural and perhaps, fascinating. The world is accepted by the philosophical mind and celebrated with reverence. Of course, Marcus Aurelius's connection to Nature was not just that of a natural philosopher. He understood Nature as a providential god. As for the moss scientist, I can't speak to her opinions. I can only say that there is nothing in the above passage by Marcus that is beyond the reach of the secular mind. I know I can often be caught up in the majesty of the natural world, awed by the events unfolding before me.
All this to say that I may be purchasing a new book soon. If I do, I expect it will end up on a shelf near to my philosophy books; as a reminder that as I seek to see the world clearly, I should expect to experience wonder at what I behold.