English Language · Reading Comprehension

Read the following passage and answer the question that follows: ''The Inner Symphony' is a reflective piece by Elias Thorne that serves as a metaphor for the struggle of artistic creation. The composer uses the image of a recurring 'spectral bird' to represent a musical idea. In the poem, the artist experiences a profound isolation. This solitude is not defined by a lack of companionship, but rather a temporary 'silence of the soul' where no melodies form. Though his hands rest on the piano keys, the sheet music remains empty. The musical idea emerges gradually—first as a faint rhythm, then a single chord, and finally a motif. This mirrors the reality that artistic work is rarely a sudden burst but a slow, piecemeal construction.' Based on the text, what characterizes the 'isolation' felt by the artist?