Final answer:
Lines 2 and 4 are examples of alliteration, a literary device that uses the repetition of consonant sounds to create rhythm and emphasize themes within a poem.
Step-by-step explanation:
The lines 2 and 4 you're referring to are examples of alliteration in poetry, which is the repetition of the same beginning consonant sounds in a series of words. This is a literary device commonly used to give rhythm and musicality to a poem. Line 2, "The current rushing so swiftly and swimming with me far away," employs alliteration with the repetition of the 's' sound, which helps to convey the smooth and swift movement of the current.
In line 4, "Our swift ordinances on their way over the whole earth," the 'w' sound repeats, which again provides a sense of speed and unity of movement. The repetition of sounds in alliteration can also emphasize certain themes or ideas within the poem, making them more memorable and impactful to the reader.
The example provided in the question also mentions that paying attention to alliteration assists in appreciating the physicality and sensuality in language, which can greatly enhance the reading experience by engaging the reader's auditory and tactile senses.