Again, hints at the secret powers of the Ocean, transferred through rivers that connect ultimately to the Ocean.
The hint is the words “vibrance” or “spirit of things” during which the scene cuts over to the river surface (connected to the Ocean Primal Source) and a reflection of a bird (though not magical, still is connected to the Sky).
The Ocean theme is so strong with Callum even from Season 1, although never explicitly shown. It’s like... implicitly hinted all the time.
And I believe this is where Callum started the long -- but ultimately rewarding -- path of bonding with Rayla.
Later on in S3, we know that this relationship started to blossom while they were on the oasis ... another body of water. Though not visibly connected to the Ocean, I believe it does have some mysterious, mystic connection to the Ocean.
Lastly, it is said that the Ocean Primal Source is at its strongest at high tide. Well, you do realize who or what causes high tide?