The beauty of nature is revealed in "Birches" primarily through imagery and figurative language. When the poem opens, the light color of birch bark stands in contrast to the darker bark of other trees, connoting a sense of goodness in the birches through the color contrasts. Darkness is often symbolic of evil, and the birches stand apart from this darkness.

The speaker brings crystal, sparkling imagery to the trees in these lines:

Often you must have seen them
Loaded with ice a sunny winter morning
After a rain.

Covered in ice, the tree "clicks" in the wind, the sound peaceful and the imagery calming. The trees shimmer in the sunlight, capturing the sun's "warmth makes them shed crystal shells."

Over time, heavy loads such as an ice covering makes them permanently stooped, their trunks no longer tall and straight:

You may see their trunks arching in the woods
Years afterwards, trailing their leaves on the ground
Like girls on hands and knees that throw their hair
Before them over their heads to dry in the sun.

The birches' curved trunks do not convey a sense of weakness; instead, the speaker uses a simile to compare them to young girls, tossing their hair over their heads to dry in the sun. Again, the sun is presented as nurturing and its warmth provides what is needed to both the trees and the girls. Therefore, the sun emerges as a constant in life, dependable and perennial.

Later in the poem, nature is equated with the bliss of childhood as the speaker recalls climbing birches and feeling cobwebs tickling his face. He recalls that climbing trees seemed to take him straight toward heaven and wishes that he could get away from the worries of life for a while by climbing a tree and having it swing him back down to earth as it did when he was a young boy. This conveys the peace that the speaker feels while engulfed in nature, free from the worries of typical life. He shares that "Earth's the right place for love," the word Earth conveying both the location and the soil and substance that constitutes nature.

Therefore, nature emerges as a peaceful escape from ordinary life with transformative abilities to bring one's soul back to the glee of childhood, its constancy faithful to humans.