‘For every kind of beasts and birds, of creeping things and things in the sea, is tamed, and has been tamed by mankind.'
This verse would favour interpreting ‘the round of existence' in terms of the living creatures mentioned, for ‘every kind of beasts and birds, of creeping things and things in the sea' is the key phrase looking back to the previous thought of the wheel of nature, just as ‘tamed' looks forward to the next thought (see analysis above). Otherwise this verse is breaking the chain of connected ideas and forming a new one, which is unlikely.
But the writer draws the lesson from it that all these creatures are tameable in the end, and indeed have at times been tamed, whereas man's tongue appears to be untameable, and can turn men, and even those creatures, wild again.
‘Every kind' simply means many different kinds, whether large or small animals; differing kinds of birds, such especially as hawks and pigeons, or parrots; creeping things like snakes under their charmers and tamed snakes kept in Temples; and fish such as dolphins and porpoises and in ancient times even wider varieties, both sacred and otherwise. And even the wilder ones have been kept in place and restrained