The warmth of the sun brings joy to life while the ocean "ice-cold, changelessly
melancholy, It drowns the sorrow and drowns the solace." The speaker, from his experience at sea, reveals another aspect of the ocean, dark, melancholy and even merciless, thus adding a sense of mystery to it.
"The Bird Repeats Its Motif" describes the clear song of a bird repeated changelessly
over the ruins of the temple of Hera, which twenty-five centuries ago was imposing.
In his reply, Smilansky is rightly suspicious of taking time travel in this context seriously, but he does not identify the source of his reservations; I believe that the (correct) reason for having them is that ML is incompatible with the idea of a timelessly and changelessly
complete series of events, akin to the McTaggartian B-series, where the time-slice corresponding to any of these events can be accessed from any other time-slice by leaping over the temporal interval that lies between the two.