What is the main idea of mast ship and what are the expressions?

The poem entitled "Mast Ship" is a symbol. The purpose of the whole poem is not to describe an objective schooner, but to express the poet himself and his dual mentality and complex emotions through the concrete image of schooner. In other words, the poet thinks I'm like a schooner. The "double mast" in a brig has some profound meaning. The coexistence of two masts means that love and career in the poet's heart coexist but are different. In addition, "shore", "wind", "storm" and "lamp" in the poem all have obvious symbolic significance. "Shore" symbolizes the love destination of women, "wind" means that the urgency of the times gives the poet strength, "storm" implies the unusual times experienced by the poet and his contemporaries, and "lamp" carries bright faith.