What does the poet say the wind god winnows?

In the poem "Wind" by Subramania Bharati, the poet says that the wind god winnows and crushes weak things. Just as grain is separated from chaff during winnowing, the wind removes weakness and tests the strength of people and objects.

The poet uses this idea to convey that difficulties and challenges make strong people stronger, while weak individuals may struggle. The poem encourages us to build inner strength and face hardships with courage.