When Nēmec (Pfeifer) says “I have a good life. I have a family. I eat well. I sleep well. I grow my roses. I’m not in danger – the present situation excepted.” S. replies: “Perhaps you should be in danger more often.”

Next to this, Eric notes:

Which would be a life like Straka’s.

and Jen answers:

Filomela’s, too.

This shows the relationship between the plot of Ship of Theseus and Straka’s real life. He has sacrificed a whole lot in his life to fulfil a purpose, and, instead of giving up for the good life that Nēmec carries, he chose to be fully devoted.