Here's a breakdown:
* Distance: The poem explicitly addresses a "distant one," signifying a physical separation between the speaker and their beloved.
* Yearning for connection: The speaker expresses intense longing for the other person. They describe their heart as being "in a foreign land" and feeling "unbound" without them.
* Desire for unity: The speaker desires a merging of souls, saying, "If only I could hold you in my arms, my heart would be whole."
* Hope for reunion: Despite the distance, the poem concludes with a note of hope, implying that the speaker believes their love will overcome the physical separation.
While the poem doesn't explicitly state the nature of the speaker's relationship with the "distant one," the intense longing and desire for unity strongly suggest a romantic connection.
Therefore, the core theme of "To the Distant One" is the powerful yearning for connection and the enduring strength of love in the face of separation.