Why did Ezra Pound reduce "In a Station of the Metro" from 30 lines to two?

Question

i don't understand please help

Answer 1

"The apparition of these faces in the crowd;

Petals on a wet, black bough."

1. Ezra Pound, "In a Station of the Metro"

Although this poem originally spanned 30 lines of verse, Pound ultimately trimmed it down to two very powerful, evocative lines. In 'Metro', the poet shapes the hustle and bustle of the world into a single impression almost as an act of meditation- - clearing away the clutter to find focus and enlightenment.