Why do lines grow longer after these? ( MEG 101 ) ( GEORGE HERBERT )

The lines in "Easter Wings" grow longer after "most poore" and "most thinne" to create a visual representation of the growth and expansion of the speaker's soul after it has been humbled and reduced. The short lines represent the low point of the speaker's life, while the longer lines represent the upward movement and growth of the soul, culminating in the final triumphant lines. The use of visual form and structure in this way is a hallmark of Herbert's poetry and reflects his deep engagement with the relationship between form and meaning.